First i love how long it takes GM topics (10yr not enough better make it 11408yr nobody likely to survive that) to expired compare to the 2 months.
On topic, a rollback is very rare to happen. Why?
Regardless of what we think, not many games rollback servers unless the bug turned out to be critical, cheaper items is hardly a reason considering when the game was launched it was plague with farming bots making hard to obtain items because of low drop easy to find on the market for low amounts; there was no rollback.
What i do see happening is a ban wave or slap on the wrist AKA nothing will happen to those that abused the bug. Normally this is how situations like this get handled by a variety of games.