Are these Sales Pages Bad for Affiliates?

I have a question. I was going through some of the pitch pages on Clickbank for some products I was interested in promoting. I noticed with a lot of these pages that there were those "float in" pop-ups for capturing names and email addresses and adding people to opt-in lists. Well that's cool, but these pop-ups usually say something like "Enter your name and email address here and I will send you a free report showing you how...blah blah blah."

I was thinking that, although these opt-in forms are great for the original seller, aren't they distracting people from buying what is offered on the sales page? ("Oh look, here's a free report! I'll get that instead of buying something.") And if so, isn't that short-changing the affiliate who got the person to that sales page?

And even if after reading the free report the person still wants the product that is for sale, he or she isn't going to go back to it through 'my' affiliate link.

I could be totally off on this, but I'm wondering what others think. So far there are a couple of products that I would really like to promote, but I'm hesitating for this reason.