I suspect it's a combination of the intense passion people feel to work on this problem and the small user-base needed to support a small team to do the work.
I'm not so good at ballparking operational expenses, but Supernotes 2 probably needs somewhere around 2000 users to break even, which probably isn't hard to achieve.
After that, the founders are fully supported to pursue their passion. Sounds like a great business model for someone who wants to do this, and I think this is why you see a profusion of utility apps with ~$10/mo pricing models on the market today.
I'm not so good at ballparking operational expenses, but Supernotes 2 probably needs somewhere around 2000 users to break even, which probably isn't hard to achieve.
After that, the founders are fully supported to pursue their passion. Sounds like a great business model for someone who wants to do this, and I think this is why you see a profusion of utility apps with ~$10/mo pricing models on the market today.