Old Method got unpatched, discovered by RandomGlitcher:
Launch gta, go to an invite only lobby, put all your money in the bank. Save and go to story.
Log in, launch gta, go to an invite only, save then go to creator and stay on the menu.
Launch gta, go to an invite only, buy everything, save then go to story.
Log in and launch gta. Start an invite only from creator, buy ammo and save. Then either log out or go to story.
Log back in, launch gta and go to an invite only. Buy ammo and save the game.