I'm with you on your guess. There are hundreds of reasons why a paid service may stop to exist. Still I would argue that running a paid service gives you more o

I'm with you on your guess. There are hundreds of reasons why a paid service may stop to exist. Still I would argue that running a paid service gives you more options compared to free/freemium: if you balance right you should not go bankrupt, it's cheaper to run (less users -> cheaper hosting and less support), better position to fend off acquisition or during acquisition-negotiations, easier to bootstrap.