Several GTA Online players started exploiting the well-known apartment/garage glitch, which allowed them to get massive amounts of GTA$ after purchasing properties and going through a specific set of menu options. In late August, Rockstar started punishing players for exploiting this glitch by resetting their accounts.
Rockstar’s support page addresses the account resets. It says, “Players found to be manipulating and abusing Property trade-ins to gain GTA$ illegitimately have had affected characters reset. As part of our ongoing efforts to maintain a healthy game environment for all players, anyone found to be abusing exploits and cheats to illegitimately gain GTA$ and in-game items may be subject to penalties including cash balance adjustments, character resets, suspensions and up to permanent bans as appropriate.”
Due to the account reset, players will lose all of their money, vehicles, and the levels they have achieved, forcing them to start from scratch.