to earn something you should use it a lot, mostly for searching. Even using it a lot, earning are just "tips", nothing more.
It's more trust-able than many other ways, but just don't expect to become rich.
nobody is actually telling the exact methods to earn. You can stake your coins and earn profit over it. The staked coins are used for processing transactions and in return you get the profit. You can stake on uniswap and even on binance.