There were many, many issues with Thulsoma, one of which was that-one-game-feature-that-allowed-Thulsoma-to-raise-a-huge-army-despite-being-a-one-region-realm (I forgot, long time ago now). That mechanic was changed because, while it was a valid game mechanic at that time, it was deemed to have been used in a manner that was detrimental to the game.
It was being abused in an obviously exploitative manner that was never what was intended that gained a group of people a clear advantage over everyone else by essentially gaining free gold.
The mechanics in this case were used
in exactly the manner they were designed for.
No matter what anyone says here, there was no OOC abuse.