USDS which is a stablecoin is quite different from others. From doing some research on it I discovered that USDS holders can earn rewards through Sky Token Rewards, where supplying USDS to the Sky Token Rewards module grants SKY governance tokens over time.
This is not new about stable coins. There are some that you can stake or hold and earn reward. But you should be careful of all these coins. Especially during bear market which might make them lose the peg.or fall than expected. I may be wrong but be careful of the coins.