Our hand was forced, effectively. We needed to pivot to a solution that offered better throughput, with lower fees, or possibly die an early death as a project. Hopping to an ERC-20 token offered immediate relief in both areas, ensuring Brave "Payments" would be able to go on and develop.
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.
(Disclaimer: I'm a bit biased toward Ethereum. I think it's more meaningfully decentralized and I own some eth.)
That said, I was more asking what they're doing right now than what they plan to do in the future (I'm fully aware of ETH 2.0 and all).
[0] https://medium.com/faast/brave-ico-review-600-in-6-days-b51d...
edit: added citation