I found this article interesting though admittedly much of it is well on the tech side. This basically describes how brave plans to move the ecosystem of brave advertising and BAT off the native ETH chain.
Currently BAT is handled totally centralized and managed by Uphold. This is problematic for a lot of people. There is a desire to move to a more decentralized solution. Being on ETH is too expensive to handle on chain with micro transactions. This seems to be a solution to get something of ETH adjacent solution.
I need to re-read and digest it more. But it might be worth your read.