The club state this when they announce the sales criteria for each game:
The following groups will receive an allocation of tickets for this match: Supporters, Seasonal Hospitality Supporters, Football Management, Players, Club Partners and the MCFC Supporters Club.
So the cake is split 6 ways. Ticket Points (née Loyalty Points) only apply to one of the six slices: "Supporters", and even that is not 100% determined by Ticket Points as a few of those are set aside for juniors without enough points. Anyone who thinks that Ticket Points have any relevance to any of the other groups is mistaken. That includes "the MCFC Supporters Club". although many (by no means all) of their tickets end up in the hands of fans with enough Ticket Points anyway. Tickets allocated to those booking on Thomson's plane to Sevilla without enough points could I guess be justified under the "Club Partners" criteria.
It is clear that the percentage for "Supporters" has been reduced this season due to an increase for "Seasonal Hospitality Supporters" (Joe's). Superbia members will also be in this "Seasonal Hospitality Supporters" group when requesting extra tickets but interestingly the club didn't send out any invites for new Superbia members this season, probably because they knew the impact Joe's would have. I believe Supporters Clubs' share of the cake has also been decreased this season. I do tickets for a large branch and we just got our lowest ever allocation for Old Trafford.
The club's biggest failing is lack of transparency about the increased corporate allocation. They continued to charge £50 for Platinum double points knowing that at the same time they are reducing the "Supporters" slice, so they know many are wasting their money but they continue to take it. I think fathellensbellend recently posted on one of the ticket threads that if Platinum were PPI City would be done for mis-selling it and I don't think that's far from the truth.