I was looking at recent triples and it seems like Piuma, who hatched a XXX Sapphire, also uses the same coding and was inactive until today. Not sure if it's just free-to-use code that's available somewhere, but the timing seemed a bit suspicious.

https://web.archive.org/web/20241113051536/https://www1.flightrising.com/lair/714341/2589087