It is correct to point out that, technically, City were not fined. UEFA are going to withhold some of our prize money from the CL, to a total of €60 million. If FFP is found unlawful by the ECJ we will get any money actually withheld paid to us. Platini may avoid this if he changes the regulations.
Article 101 states that agreements to limit investment are "prohibited" and that any agreements resulting are "automatically null and void". The agreement to withhold the monies would, therefore, be null and void. The court would not be interested in whether we accepted it, agreed to it, saw it as a pinch in the slightest, since it stems from a prohibited agreement.