Subscriptions have a "boiling frog" phenomenon where a marginal price increase isn't noticable to most people. Our payment rails are so effective many people don't even read their credit card statements, they just have vampires draining their accounts monthly.

Starting with a low subscription price also has the effect of atrophying people's ability to self-serve. The alternative to a subscription is usually capital-intensive - if you want to cancel Netflix you need to have a DVD collection. If you want to cancel your thin client you have to build a PC. Most modern consumers live on a knife edge where $20/month isn't perceptible but $1000 is a major expense.

The classic VC-backed model is to subsidize the subscription until people become complacent, and then increase the price once they're dependent. People who self-host are nutjobs because the cloud alternative is "cheaper and better" until it stops being cheaper.