OK, the numbers are not great, so Marathon probably is not a big success. And live service games have a death penalty quickly applied if cost of running it exceeds revenue stream. And live service games can die in the first place, your single player game you can play even if the company hates how it turned out.
That said - I don't think an extraction shooter has crazy cost associated with it. Vigor for instance is still running, even though I doubt it has more than a few hundred players at a time. On Steam it sits at a 100 concurrent players. But that is enough to fill the sessions with players and seemingly enough to pay for running costs. A small dedicated fanbase can be enough for this.
Running at this level would be not a big win for Bungie, but it may be sustainable. There are certainly dedicated fans that might keep the lights on for years to come. Except Sony wants only big hits or nothing and pulls the plug.







