Wargaming wouldn't really need anyone else to tell them what mods people use.
Every single mod that get loaded into the game, is, for example, printed into python.log - so unless the cheat makers found a way to hide their mod from python.log, that's one sure way to find it. And I'm sure Wargaming has other means to tell as well.
Rumours are great, aren't they? LOL.
People also blamed the "Top Tankers Event" mod, for example.