Dude ,that agreement is purely down to the two clubs. He could still refuse to come here , which he's been doing for the past two seasons. Pretty simple.
I feel like Berardi won't go to Inter this season coz of Sass' promise to Juventus since they're letting him stay one more season, but in no way does this reveal the player's true intentions. If it was Inter instead of Juve with first right of refusal on his deal, I think he would've been more open to a move.
sounds like an "okay" from the agent for me. he didn't care about fighting his way into juve's starting lineup. inter are only slightly superior to sass, it'll be just the easier path for him - and such a move would make him a liar, too. (he apparently refused juve just to play in the el with sass.)
i must admit i had high hopes for this kid. he'll receive his premature career ending at inter before it really started.
i'm not sure sassuolo would care about where the money comes from. marotta still might have a say in this, but seeing how ambitious the player is, beppe might just let it go.