Add "Tipping" and "Donation" metrics via iframe for content creators

Brave is pushing the “tipping” feature so that patrons can tip content creators they follow. It seem logical to allow the option for content creators to publish metrics for a “thank you” page or “donations made” data that would help build trust in Brave and the content creator’s community via an iframe.

It could have donations made data, and/or list of donor’s name/tag and amount for a “thank you” page.