The MLS deal supposedly involves an ownership stake in Inter Miami, and a cut of the entire league’s merchandise sales with Adidas, plus the entire league’s TV rights deal with Apple - depending on the league’s growth it could be a far more lucrative offer than the Saudi deal.
The whole deal goes completely against the existing salary rules of the league, for the benefit of a team that is still under sanction for blowing past the salary cap that already exists, and the MLS authorities are just ignoring all that and helping them get it across the line anyway.
But anyway, no fears about foreign money ruining football when it’s the Americans behind it…