People who have played a lot of GTA Online recently might be forgiven for thinking that the in-game universe's equivalent of the rapture just occurred, not long after a major hacking incident. The problem came as quickly as it went, and while it stuck around it prevented the completion of daily objectives and the tutorial. The issue? All store clerks were gone.
The first reports of this odd phenomenon come from less than a day ago, and since then the clerks have returned to their jobs, however there is no explanation for the issue. The NPCs were just simply missing. They didn't spawn at all.
On the one hand, this wasn't an issue that impacted regular gameplay for most players as the convenience store clerks never really play a major — or any role — in the day to day activities of the average GTA Online player. That is, unless they're part of the daily objectives. Oops.
This was particularly bothersome for players who have been diligently keeping up with their dailies for a long streak only to be cut off now. GTA Online tracks how many times you complete daily objectives back-to-back, and provides stacking bonuses. Keeping up a streak for 28 days, you get GTA$ 500,000, which is a pretty serious payout for low-effort busywork. This bonus is noted in our extensive money guide, which includes a host of other things to keep an eye out for too.

Beyond potentially tossing 27 days of hard work out the window, this particular issue also messed up the tutorial for the game. At one point, Lamar instructs the player to go and rob a convenience store at gunpoint, however without a clerk to point your gun at, players found themselves waving their pieces at thin air with no result.
Sure, thankfully the tutorial is skippable, but that shouldn't be something players are forced into, especially if they are new to GTA Online. No one knew what was going on, whether the absence of the clerks was a bug, a glitch, the side effect of some new hack or possibly even an unannounced in-game event of some sort.
In the time since the return of the clerks, many theories have been flying around as to the cause of the disturbance. One popular, and overall the most plausible, theory is that Rockstar uncovered an in-game money glitch that somehow exploited the clerks in whatever which way.