I have copy pasted your question to chatgpt, the response was long, but tldr: TL;DR
Como declined Tottenham’s €70 million offer because, once Real Madrid’s clauses are accounted for, their actual return would be far less—and not reflective of their valuation of Paz. Instead, they’re holding out, hoping for a deal that either maximizes their net proceeds or removes the contractual constraints entirely, all while keeping Paz as a key asset for now.