Ahhhh, I see what you're saying. That might be a risk
if the story had a fixed length (e.g. if it were structured like an episode of
24, where once the episode clock reaches
23:46:00 the writer has to finish the story in the next 14 minutes).
In that case, yeah, the writer might not
want to get to the end. (Although I still think this is an unlikely theory, really. Imagine writing something that actually attracted an audience willing to pay for it – and then deciding that the sensible thing to do is
fuck with those people for moar money. I don't see it.)
Anyway, that's not the case for
Female Agent. The main quest is specifically written
without a deadline – the heroine's job is to survive undercover in Bangkok. Once Bangkok is set up, we can create new story content for as long as the community is willing to support it!
So yeah, I do want the project to continue earning money (for as long as we're still adding meaningful content, that is – I'm sure nobody will be playing this in 2030), but my evil plan for that is to
produce more content, it's exactly the opposite of what you suspect.