Email Marketing - One-Time Offer Style on 'Thank You Pages'

I was just wondering what experienced email marketers think about the idea of adding a OTO style or a quick paid product offer after the prospect has confirmed their email subscription and taken to the 'thank you page'.

I was thinking about creating a 'thank you page' template structure as shown below:

Thank you for confirming your email subscription! As promised, here is the download link to your free gift down below:

FREE GIFT PRODUCT IMAGE GOES HERE
LINK-TO-THEIR-FREE-GIFT-GOES-HERE....

____________________________________

WAIT! BEFORE YOU GO! YOU MAY FIND THIS HELPFUL AS WELL!

Then there's another product image that represents the OTO style paid product on the bottom half of the 'thank you page'.

I'm thinking that it could be a good idea because it could get new cold subscribers to make a quick purchase if they really liked the information that you previously gave away to get them to sign up to your email list. They can make a quick choice to buy your offer right after confirming.

How many of you have actually tested this? Would appreciate your experiences with this style, if you've ever tried it or if you believe it would be a good idea.