I was wondering the same because for the Slothicorn art it's recommended to get one of those square key thingies for your digital wallet to put in posts. I was coming to the conclusion after a while of looking into it, that what @aggroed said was the case... because that is my only digital wallet atm, my Steemit one. LOL SO glad you've asked and been answered! :)
RE: Stupid Steem Wallet Question....