Here’s a pretty good example of a pop under offer. I can’t remember where on the web I was when this offer popped into my screen but I think it’s a pretty good example of an optin offer.
There are a few things that make this a good optin offer.
1. It’s targeted. The headline is the point. It says “Book Lover?”
2. It states the offer clearly.
3. It’s a good offer. A free chapter a day.
4. Privacy policy. Check.
5. The image matches the offer. Books . . . book lovers!
I’d sure be curious to know the stats on this but I bet they get a great conversion rate.