Within the hour, Destiny was taken offline, and eventually came back online about 10:30 PM ET. The cost of a rollback was that anything your character did between 11:30 AM and 1 PM ET was undone. And even if they noticed the currency issue, Bungie has never done a complete rollback before, so they may have felt safe to keep playing. They reacted swiftly and gave prompt updates every hour on the hour until the situation was resolved. And it was resolved, minus that hour of missing time.

Source: Forbes January 29, 2020 13:18 UTC