Is a static site hosting platform required to proactively monitor which content paying users host in your jurisdiction?

Wouldn't a solid set of processes to handle content complaints and knowing who your customers are in case the hosting country's law enforcement has a case suffice?

Or are you having some free tier where users can anonymously upload stuff?

In the latter case — a free place to stash megabytes — you'll need to detect password protected archives in addition to unencrypted content. Get ready for a perpetual game of whack-a-mole though.