As funny as that sounds, in Spanish Fa law they are all pretty much obligated to have these release clauses. 20m is pretty low. You should see the random 70-100m clauses they set for certain just decent - good players. Old Valencia team used to be experts at it lol.
Risked a lot to come here, gave his all, scored some important goals, and then leaves when his time is up. Very classy and humble player, I hope his next club is a better tactical fit for him. Good luck.
I would much rather do business with those than being robbed by a Spanish team. As a professional football director, if you can't be half as good as some random Turkish guy(most of the board members of Turkish clubs are not professionals) when it comes to selling, it is just another good reason to be fired.
no one will pay that ofcourse. but i think clubs in Spain must have release clauses on all their players, think i read that few years ago when Barcelona was putting a ridiculous clause on Messis contract