I suspect Barca couldn't afford much up front after buying Coutinho and Dembele. They likely wanted a relatively small upfront and then installments and Atletico refused most likely.It's only loyalty if he actually had an option to leave but decided to stay. He only decided to stay at Atletico last time when the Utd move broke down and I have serious doubts over Barca's ability to buy him. Atletico wouldn't willingly sell to them which means Barca would have had to pay his release clause which would have meant paying the full sum up front, something that they certainly couldn't do when they signed Coutinho for instance.