1: We've run some investigations and bans have been issued to those accounts found directly involved in these actions.
2: The exploit being abused has been fixed internally and it's been tested and reviewed by QA since it is a deep issue in the engine and any code changes to that are risky to the integrity of any other subsystems. No ETA on when it's going to be released other than when we've got the green light and we're sure these code changes won't compromise the stability of the game.
3: There are no plans for a rollback at the moment. Neither refunds of any items or materials as Conan Exiles doesn't have MMO-like support. Close term we'll focus on deliver the fix for this issue as soon as possible and remain inflexible against those players who abuse of this vulnerability.
Hope that helped clear out the situation on our end.