Hey Jonathan, big fan of Brave, and I meant no disrespect with my comment.
Serious question — how does BAT distribution work with ETH fees being in the same range now? Have you considered doing atomic swaps with a network like Stellar for a low fee transaction environment? They have a Metamask alternative called Albedo that you could probably effectively integrate into Brave.
I've worked a lot with Stellar and would be glad to help (not shilling, I don't own many XLM, I just know the network well).
Contact in bio if you're interested.