I would agree, earning BAT is one of the easiest ways to earn free crypto... I've been using Brave as my primary browser for several months now and currently have earned just over $23.00 dollars (over 100 BAT)!
I've never heard of or tried Presearch. I will definitely be checking that out. Hey, not a bad domain... presearch.org! :)
On my list, I would add Tezos. I've been earning Tez just by staking it and it's SO easy! You don't have to do anything! Just set it and forget it!
Anyway, hope you are well! ✌️
RE: Crypto Optimism and a couple places I am earning FREE crypto