I really doubt completion of a live service game is good news to either the devs and players. Imagine Respawn announced that Apex Legend is now considered completed and we are moving on to the next game...
I also doubt that the devs think they should complete the game at all, the business model is a success thus far so there's no incentive to risk a change of direction. I'm pretty sure 99.9% of all the porn games that chose a non live service approach didn't make nearly as much money as this one did.
It all boils down to the cold, hard market logic. "Completing a game" sounds fine and dandy, but if the monetary return is unsatisfactory it won't be sustainable (that's why we never hear from some of the best porn game devs such as grimhelm and pixel factory after a couple of releases anymore). This is also supposed to be the reason why they implemented Denuvo.