Originally Posted by
Luin
No, they "allow" the mod because FFXIV has no client-side anti-cheat software.
As for why, it's (A) because the game was a hot mess at launch, and they never got around to implementing it because (B) it's a legal minefield, has enormous cost, and (C) doesn't actually stop the most harmful cheaters.
Anti-cheat protection has never worked. Cheaters will bypass it, it's only a matter of time. It's a complete waste of time, money, generally makes the game performance trash, and it aggravates players.
To be clear, it's not allowed. It's a 3rd party program, it is explicitly banned. Using ACT, mods, any 3rd party programs that interact with the game or the game's data in any way, is against the ToS.