The McFlurry machines being broken is now part of popular culture. It's a meme. There are websites to track if they're "broken". And they're broken a lot.
How can a company like McDonalds take that kind of brand hit? Screwing franchisees makes even less sense.
Honestly I'd be more inclined to believe that it's some current or former McDonalds executive with a relationship to Taylors such that they or someone they know is directly benefitting from the support contracts.