Looks like Newcastle owners have found a way to avoid FFP restrictions. Newcastle owners have just bought 3 top clubs in Saudi Arabia. The one Ronaldo is at, one that Messi is linked with and one Benzema linked with. Apparently there are no rules in any (or all) of these being loaned to Newcastle with the only affect being if Newcastle pay wages. Not suggesting any of these will end up at Newcastle but it does highlight a potential issue with multi club ownership/FFP etc.
I'm sure I read somewhere that part of Ronaldo's deal was that he'd be loaned to Newcastle if they qualified for the Champions League.