The unfortunate decision has been made to evolve Bookmarks into Saves. One of the key changes was:
Will my saved posts and lists be public?
and with that a whole bunch of Data Explorer queries got obsolete.
As the data migration was completed on October, 6th. I assumed the Votes table to be empty for votetypeid = 5 (Bookmark (former Favorite)). That is almost true. Some users managed to create 105 bookmarks after October, 12th. I suspect those users might use a userscript, the API, the (soon defunct) App or have found other means to postpone the inevitable.
In the small chance that there is a serious issue here that needs fixing, I report this bug and ask this to be investigated and possible patched. If this closes a loophole found by some users, I apologize upfront.