There was a case locally where (usually) a St-Gaudens would turn up in the collection plate of some church at Midnight Mass Christmas Eve. One per year for a whole lot of years, always a different church as far as I recall. Some churches went public and a few didn’t but it was regular as clockwork.
It was a real person who was doing it and it was kept up after his death; the request that his heirs continue was in his will (as a request and not a stipulation) along with a supply of the $20 gold pieces that were his coin of choice. I never got the full details but it was something about a church helping him out just before or after WW II when he was having some really bad times. That church had closed so he just picked churches at random.
(I know because we purchased the rest of the estates coins and scanned the remaining “donation stack” for rare dates or varieties. And solved a mystery I had wondered about for years.)