An independent group of experts hired by UEFA found that those sponsorship deals were inflated by 40-60x. Gianni Infantino (UEFA president at the time) personally stepped in to negotiate with the clubs behind the scenes, ensuring that they would avoid significant sanctions, and helped to cover up the true magnitude of the FFP violations.
Juventus didn't give money to refs. In fact, they were absolved of all wrongdoing regarding Calciopoli in court. To say otherwise is flat out wrong and a blatant lie. All transcripts of the phonecalls from Calciopoli are public and there is literally 0 evidence that Juventus or anyone affiliated with them bribed any refs or influenced refs in any way.
To say that PSG and City are not receiving preferential treatment is ridiculous, considering clubs from smaller countries like Turkey and Romania have been slammed with crippling sanctions, and clubs like Roma have been forced to sell off half their club to comply with the rules that the aforementioned teams frequently skirt.