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Please note that this post is on a niche by niche basis. For some niches it may be less effective.
I've found for certain niches that showing a review of multiple OFFERS really can help to drive conversions and total sales up. The place where I think this type of site works best is in the loan industry. I would give the loan industry an expert level of difficulty as it's fairly hard to compete in, so be sure if you try it you have loads of tracking (which affiliate unleashed can do 
) installed or else you're going to lose money.
A good way to run multiple offers is to do a comparison of the features / benefits. IE: You can get a loan for up to $500,000 here. They run no credit check, etc.
I've actually seen revenue increase about 40% from running multiple offers. Thus allowing you to bid higher on your power keywords (ones that convert well), and thus giving you more traffic, sales, and hopefully profit.
In the affiliate game, making small tweaks on your page can have such a dramatic effect that you would not believe it.
What I suggest doing is find a niche you're profitable in. If you're running a consistent profit, no matter how little it is, you're golden. Now, using a split landing page tester (which affiliate unleashed has...), make some tweaks and see how much of a % increase or decrease your landing page has to your offer.
Use the higher converting page, and repeat. Using these techniques, I've been able to get a ton more profit.
Another good way to run multiple offers is if the offers have limitations on them. For example, some offers may require people be in a certain state or want a certain amount. For this, on your landing page you could use a drop down menu saying: "Where do you live:" etc.
Send them to the corresponding offer.
Hope that helps increase your profits. 
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Awesome! When will affiliateunleashed open?
We’re hoping to get it fully released in January.
I’ve always wanted to do some comparison affiliate offers to see how well they convert but I just haven’t gotten around to it. Maybe I’ll be able to clear some time towards the end of the month and give this a try.
Let us know how it goes..
I’ll subscribe to your blog as well.
One campaign I dont recommend doing this for (at least in my experience is ringtones.
Just thought I’d share that.