Its some sort of cooperation with sassuolo involving berardi, but we dont know the details.
When berardi is resolved, we can get a full idea on how things went.
As it stands, that 18mil will make Sassuolo motivated to get everything out of Berardi. if Berardi fullfills his potential, it will be significantly thanks to all that competitive time he got allready at a young ago, and it was sassuolo who gave it to him. Meanwhile, we kinda made deals that benefitted them.
Its not "18 mil zaza". hence if he wasent at sassuolo, i doubt we'd buy zaza at all. Its all part of project berardi, and we needed some backup$#@!.