Only one guy was doing the drop box thing and you can recast a mail ballot if you need to. If the crazies try to attack your polling place on election day, you’re probably not getting your vote in on time at all. Also USPS doesn’t lay a finger on ballots dropped in the ballot box, they only carry mail ballots that are mailed instead of dropped off.
Considering people can view things more than once and Elon has multiple false claims, it’s pretty easy to get to that number. You can doubt him because hes Musk but those MAUs are more than enough to hit that number when you make you web site prioritize your own posts on it, he probably has no less than half a dozen lies from just this past week alone. Not to mentions views from people who arent users, embeded views, etc.