Auto-refresh in tavern will use your credits very fast. It spins until it hits a card, not how many credits you can afford to spend. It stops when credits are gone or hits a card, whichever comes first. I accidently hit it one day, was a lesson. LOL I limit my spinning to how much i care to spend, how luck is running or how many spirits i'm trying to get. Auto-refresh is not condusive to that.