That would be my thought. I'm tired of every single decentralized project wanting to reinvent the wheel and not partnering with other projects who have already created a robust solution.
Of course only ~10M people use Brave monthly at the moment so it's a very niche user base, but Steemit could at least partner with Brave so those users who want to be rewarded by Brave could collect ad revenue and share some of it with the Steemit platform. It would be like an ad-bonus to the STEEM rewards, it could even be paid directly in STEEM once they receive BAT from Brave. Users could select how much to share with the platform from 0 to 100% (I'd be happy with a minimum > 0%, more like 10 to 30%).
This would be a great way to extract value from non-Steemit users who visit Steemit posts. If one day Brave is at least as popular as Firefox, which I think is definitely doable, it could be a big deal.
RE: Testing Ads on Steemit.com