What about the standard of "I'm young and this is a side project I'm doing in a couple of hours at the weekends"? Of course once you have a real company with more than two customers $75 is nothing. But version 0.1 is often a tool that's only useful to you.
Heroku has free dynos for side projects, and hobby dynos ($7/dyno/month) for slightly-less-side projects. So that original $75/m quote isn't quite right for that situation.
> What about the standard of "I'm young and this is a side project I'm doing in a couple of hours at the weekends"?
Well, even someone who's young (for values of 'young' older than high-school age) is probably spending more than that every month on beer, food & entertainment each …