where did you get that "verbal agreement" from? Twitter?
He would've agreed to a release clause, had he really wanted out anyway, wouldn't he? Clearly fucked up, can't blame anyone but himself.
If you weren't skipping posts by the bulk as what it appears to be the case, You would've seen the link i provided in my post, And from the other three memebrs who replied.
http://www.sport.es/es/noticias/barca/dembele-cuestion-horas-fichaje-barcelona-6218701
Just because it's easy for us to write "Agree to a release clause" doesn't make it an easy thing in real life, I can easily write "Open spinal surgery" or "heart transplant", Yet doesn't mean their easy to perform.
The reason we rarely see release clauses outside of spain, Is because there is no agreeable and accurate formula to calculate a proper value for the clause, That can satisfy both parties
It's easy for a club to shoot itself in the foot if they ended up agreeing to a clause that eventually turned out less than what the player actually matured into or failed to account for future market, If dortmund put a release clause 4 times what they paid for him, He'll cost 60m now, A disaster in today's market.
It's also easy for the player to shoot themselves in the foot, If they agreed to a clause too high and overestimated their development and the future market. And they end up stuck, Might as well never had one.
Release clauses can be tricky enough to stop entire deals, That's why both the club and the players avoid them, That's why verbal agreements are much more common.
As i said in a previous post, Modric had a verbal agreement with tottenham, Masch and suarez with liverpool....etc