Interesting. Thanks. I've been using Brave for over a year, but until the last couple days I thought they were sticking with bitcoin. The BAT whitepaper mentions Steem.

Steem is social-media and blogging platform lets users earn revenue when they receive upvotes. It is a kind of monetized Reddit. Steem does use Blockchain, but it is not a generalized means for publishers and users to be rewarded for content. In short, it is not a Blockchain-based digital ad platform. It is specific to the Steem platform.