If you've ever played a competitive online game you know one of the banes of such games are hackers and modders. I on and off play Dragonball XenoVerse 2 and it has hackers and modders of course, to get illegal moves, illegal cosmetics and to modify stats. The developer found while they could ban people with illegal moves and cosmetics(though they didn't care about cosmetics) Stat hackers could use modified saves to get though.
The solution a "Shadow Patch". As the game calculated damage and defense bonuses the highest effective boot you could get was 1.93% with max possible stats, hackers where raising thier stats to get 2.3% boost. So developers went in and added a bit of code that basically made it so if your boost exceeds 1.93 it becomes zero. Now those modders who spend money on their modded save file to get beyond max stats found themselves with weak characters.
Found this out while watching YouTube videos of a XenoVerse Streamer demolishing Modders, confused how they where being destroyed so fast, why it was easy was clear they sucked at the game, but shouldn't the defense and health mods extent the battles? But when your mods weaken your character and you suck well your shredded like tissue paper.
It's like someone who only ever uses aim bot trying to play and FPS, they never learned to aim themselves!