I mostly use Brave on my phone because it makes the browsing experience faster and removes most ads by default. I won't change to another browser on the iPhone anytime soon. Having said this, I haven't used the payments feature outside of web3 (Ethereum DApps).
I don't watch ads with any interest or attention in general, but I often have Youtube playing some live concert on the background while I work and ads cut midway forcing me to change tabs so I can skip them. The idea that instead of breaking my concentration to stop an add playing I can simply let them and that _that_ could be a little money generating activity seems appealing.
(edit a word)
Secondly, Brendan Eich already confirmed that there is a 70% revenue share for users. Let's pretend the advertiser is paying 10 cents per view, then you would get 7 cents per ad watched. 70% is a lot.
Thirdly, even if it's just a few cents, it's better than nothing. Things build up over time. Before you know it, you'll have a few $. That's awesome. You can get a month of subscription on a ton of websites for like $3. That's also 3 songs on iTunes store, or a paid app on the app store.