the more coins you have the more you will get back from staking. if you hover your mouse at the bottom of the wallet where it shows stake weight. keep an eye on the network stake weight. if it increases it means that more coins are being staked by the whole network. so ppl are buying from exchanges and then sending to their wallets to stake
Yeah, that's what I thought was happening. I was staking pretty good everyday, but now getting a lot less than I used to.