Being sustainable is important, but not at the expense of people’s ability to tinker/learn. At the very least, offer a highly-limited and almost-crippled free

Being sustainable is important, but not at the expense of people’s ability to tinker/learn. At the very least, offer a highly-limited and almost-crippled free tier, like Heroku or Glide does. Maybe you can only register a few users. Maybe the # of function calls are limited to a few a day. Or maybe dormant apps go to sleep.