Well all know UEFA are bent as a 9 bob note, but I do not think they are so bent as to have rules and to completely ignore them, or to make up new interpretations which are completely arbitrary and unjustifiable. They need to have at least semblance of credibility.
Personally I think it very unlikely that PSG have broken or will break any of the rules. I would imagine they have a planned revenue stream that (in conjunction with the allowed 3-year losses of €90m) supports their spending. Neymar will doubtless bring new sponsorship opportunities and revenues, for example.
I thought it was €30million rather than €90million?