aETHb is a rebasing token. When holding aETHb, your balance will increase in proportion to your ETH staking rewards. A rebase runs daily, and rewards occur each time this runs. So each day, you will see the quantity of your aETHb increase by a small amount. aETHc, though, does not change in quantity but will appreciate in value, daily. Mind that to pull out your rewards, you’ll need to sell aETHb/aETHc on Ankr DeFi, as Ethereum hasn’t implemented the unstaking functionality yet.