I know that is not correct stuff to do, but some game previously and for more that a year (multi player game not mmo) use the local save system, for example Dead by Daylight was using local save file for storing anything regarded multiplayer progress (protected with EAC, but there is LOT of save file cheater), this is a mess but some indie use this method also for multiplayer game.
Progression of the system was cloud copy, that’s all. Protected with EAC. Nothing more nothing less. Did this fixed file save cheating? No.
so if big indie use this method why we can’t use it? this is a good question.