All I do with the two is participate in potential airdrops and the second one you mention is because on bitget there are instances where as long as you have a BGB balance that meets their criteria, you can be showered with other airdrops that they have.
Not entirely sure if that would be worth it though, that doesn't really mean much at all. There are VERY unique situations when they do, and people spend ton of time and effort (and some even money) to actually make that kind of airdrops income, which is not worth it.
If I spend a ton of time, then I want my return to be worth it, if my return is less than 2 dollars per hour, then why would I spend that kind of money? For example notcoin was something that paid a lot, and people got hopeful about telegram projects because of it, but NO other one, like out of thousands of them, paid more than 2+ dollars per hour, so there is really not any that worth it.
even if you are not trading, you can really earn rewards and I hope this system that they have lasts
Not your keys, not your coins. Risking for such rewards definitely not worth in most cases. I do see people are staking in exchanges for some rewards but definitely high risky one. Still, staking within a wallet is good because your coins are not leaving off your wallet.