This is the place to go at 
What is SponsoredTweets?
SponsoredTweets is a website where tweeters from ALL levels (big and small accounts) can sign up and allow people to pay them to tweet sponsored messages.
Who Can Signup?
Tweeters
The cool thing about Sponsored tweets is that they accept both large and very small tweeters. Your value is essentially based upon your number of followers and the amount of people you're following. And although you can set your own price to whatever you think your tweets are worth, there is an automated system which tells you what your approximate value is.
Tip: I recommend that you put your price slightly below this automated number to give yourself a little extra edge over the competition. 
Even if your tweets are only worth a buck or two, it takes you all of 30 seconds to write the tweet. Extra money for very little work.
Advertisers:
The case study below will be on my experience advertising on Sponsored Tweets.
Advertisers are those who want to pay others to tweet out messages. The price ranges from around a dollar up to thousands of dollars and even those "Call for price" tweets. 
My Experiences
I decided to spend around $600 bucks on tweets to see what would be the best for marketing my campaigns if I decided to continue my marketing strategy on twitter.
I selected a few higher profile tweeters and a few lower profile tweeters. I wanted to try all spectrum of the tweetverse.
Here are my experiences with sponsoredtweets.
This is some really good (free) data for you.
It appears that the best deals are at the bottom (meaning those with less twitter followers should go sign up as tweeters right now)
The more expensive spots were great in some ways, but had the more expensive cpc.
To me this shows a lot. I'd rather buy 100 tweets from low volume tweeters than 2-3 large tweets.
Now, Go sign up for sponsored tweets and start making money.
Related Posts:
I just spent a couple hundred worth of traffic to my wife’s blog and had a similar outcome. My biggest buy did the worst.
I went with low volume with high FAR scores.
I will be testing next to my own blog soon and will share the results.
Great input! Thanks for further confirming my results Tim! Much Appreciated!
More Info:
I spent $212 so far. My average CPC was $0.79 but this was skewed higher by my biggest one buy ($100+) that had an average of $1.49 a click!
I’m .01 off from the required retweet for that one (it was a “web celeb”) and don’t know if he will retweet it anyway.
Some of the smaller buys actually did pretty well.
Your reply to Jonathans case study makes them more catchy now.
Definitely some good data though but what about your ROI? If those clicks converted unusually low the service wouldn’t be much use.
I’ve been putting off trying SponsoredTweets for a while though. Your post is encouraging me to put down some $$ and do some testing.
I see alot of people online pushing this program… But I am not getting on the bandwagon just yet. I was wondering why you didn’t block out the total for the reach… Well hopefully you had a good sales percentage from it… I do love their stats from thier site…
Hmmmm, somebody impersonating Mr. Volk? Good one! Now the real question is ‘Was it Barman, or someone impersonating Barman impersonating Jonathan?’.
btw dangerbrown.com rocks
I have my accounts signed up and this past week saw someone buy with the more expensive accounts on Monday and then a company buy on the cheaper accounts on Friday. They money is alright for not doing much.
I saw your Sponsored Tweet on @shoemoney. Funny!
Check out the real deal super affiliate @jonathanvolk on twitter and on his blog – http://j.mp/3vPdph #ad
I see what you did there. posting under Jon’s email address brings up his gravatar. So 2006.
Ppc.bz does rock though.
And just how many of those clicks are real and not from bots? Do you know for sure?
http://www.hadermann.be/blog/41/twitter-traffic-might-not-be-what-it-seems/
I love sponsorred tweets, I have been making easy money since they opened with one of my sites that I tried it on. I live being able to control cpc.
Very enlightening.
I had not looked at it from the advertisers point of view before. I have almost 10,000 followers and have been gradually dropping my suggested bid price and no advertisers yet. so your description about less is more might account for that.
I to am curious about your ROI though.
@linkmoneydotorg
I believe its not the amount of followers that matters, but it is how “deep” the relation between the publisher and the followers
[...] Click Here for the full post on his sponsored tweets experience. [...]
I have signed up but I am still waiting for my 120 days to end. only 1 more month.
This just inspires more people on twitter with under 10k or 5k followers to sign up, knowing that they can provided better CPC rates on average than someone with a high follower ratio.
You’re also able to look at the tweets that person sent has out. If they’re ONLY sending out ads, they probably won’t give you as good of a CTR as someone who sends out more actual content. But looking at everyone’s tweets can be time consuming.
And Jonathan, you do realize that to figure out your blacked out “Reach” column, you can just use this formula, right?
(price / cpmf) * 1000
So the first guy on your list has over 75,000 followers….
m .01 off from the required retweet for that one (it was a “web celeb”) and don’t know if he will retweet it anyway.
I love Sponsored Tweets! Making money by tweeting is easy and fun. Plus, it gave me another reason to build my followers.
It seems like an interesting way getting traffic, branding and exposure – but still, I wonder how the ROI actually is?
[...] This last week I did a sponsored tweets case study. [...]
jon, i would be interested in knowing how i can increase my chances of being asked to tweet for someone. how can i better advertise myself as a tweeter?
Hi Jonathan,
SponsoredTweets sounds as though it is a simple/easy way of actually earning some good money with ones twitter account. Will have to just give it a try and will be back to add more.
Brian Lawrence
bmlawr
Jon,
I signed up for sponsored tweets. So far I have completed five offers for a total of 14.50 profit. Need to make at least 100.00 before “cashing out”. I have 1800+ followers and gradually increased my bid price from $2.77 to $5.00.
It sounds like I’m missing something if I only get 10 clicks for an offer.
How are you “pointing” people to get a higher click rate?
Respectfully,
Nicholas Chase – (given up on PPC / CPA as too costly / time consuming to make an online living) and we are broke anyway….)
Thanks That’s Very good .