Updates to the game are performed for the betterment of the community as a whole and this exploit was a big one. Yes, there are a few players who decided to take advantage of this exploit and their accounts shall be effectively reduced to ruins if for some reason they are unable to rebalance their bases correctly. The fact that a few subs on older never enacted "the ability to sell" or "upgrade" is an unfortunate byproduct, but correcting a 7 year old exploit across 100+ servers far outweighs 50T of Tib on a random sub somewhere. Resources that should have been spent upgrading bases. I feel you, but the exploit was much greater than your world.