If a 1099-K recipient can be considered an overtime worker, then I'm glad I don't have any OnlyFans content creators as clients.  As a NY Times columnist asks today, 

"President Trump’s promise for “no tax on tips” has raised important practical questions for the Internal Revenue Service. What is the exact definition of a tip? Who typically receives them? Are photos of bare feet a type of pornography?"

The article is behind a paywall but you can imagine it as easily as you can read it.  

As for how to inform employees of how much overtime they earned this year, the suggestion that "a third of what's shown on your final pay statement" may work for some but not all.  I remember from my college days, when I was a union worker (American Newspaper Guild), sometimes overtime was time and a half, and sometimes it was double time when combined with holiday pay.  We worked a lot of holidays.  But the law says only FLSA-required O/T is eligible, so that's the 50% part.  FLSA also says it applies only to employees, not independent contractors.  But who cares what the law says, these days?