Release clauses don’t make sales easier. They are usually put it when you really DON’T want to sell a player, because as we saw with the Enzo situation the terms, structure, taxes etc become a hinderance, even if the amount isn’t. The fact that one wasn’t in place, even after Caicedo had shown interest in Brighton accepting bids for him, adds validity to Caicedo’s story about how that re-sign went down.
Of note, the moment they broached the deal depending on another player (Colwill), if they really did that, then they broke even the most Brighton friendly versions of that story that came out.
I’m fairly certain they didn’t tell him: “we promise to sell you if a reasonable bid comes in…unless Chelsea won’t give us Colwill.. then we dig our heels in”.