Sure the scale of salary is different but principally it's the same thing. De Gea has no obligation to extend his contract. Yes the club stuck by him during tough times but he also repaid the faith by becoming the best GK in the EPL and dragging you lot to the top 4 last season. Plus if he signs a new contract, will Madrid really pay a world-record fee to get him? They might decide to forget it and turn their attention to another GK and pursue an alternative marquee signing. GK spots in top 2 Spanish clubs hardly ever open, it's a no brainer move for him