I like the iframe idea - it could actually be interesting to try to write the disclosure as marketing copy to join Refer.ly. EG "[Firstname] thought you'd love

I like the iframe idea - it could actually be interesting to try to write the disclosure as marketing copy to join Refer.ly. EG "[Firstname] thought you'd love [product name] from [vendor]. For spreading the love [firstname] gets a referral fee if you buy! Find out how you can start making money referring friends to products that you love too with Refer.ly today!"