Hi! Yes, you are right about the first question. Ecency gives some kind of cash back if you delegate your power to their account. The amount of cash back depends on the amount of your delegation. Delegation is the process when you kinda give them part of your hive power. But the delegated power belongs to you and you may take it back any time you want:)
RE: Is it Easy to Play the Bass in the Dark? The Answer is "No"