I agree that these are all good questions. Brave is moving from Bitcoin to Ethereum, and they are going to be using a token called the BAT or basic attention token. I'm not sure if it will make the experience better or worse. There seems to be a number of approaches to get crypto into the browser (like the metamask extension, or dApp browsers like Mist). Who knows if this approach will work. At least they have a lot of experience behind them.
Content has been polluted by ads. I'm willing to support experimenting with new models.