I do not trust any of these kind of apps whether it be the decentralised or centralised. Earlier in the beginning of my crypto entry I invested in several sites with my hard earned Bitcoin from the faucet site but never got back my principal amount and the interest or the dividend is far away. I know only the bounty campaign where I got earned without the trading and gambling.
I agree like you, I only know of bounty campaigns where I can get results without trading and gambling.
from the results I get, I spend it on my family's daily needs.
because in my family, it is forbidden to participate in gambling events.