Comment by pclmulqdq

This isn't so much a side project as a project that I tried to bootstrap and then never turned off, but as of December/January, I have made a little more than $500/month selling cloud true random number generators. I have not touched the code in a very long time, and today it is pretty much just a website and a listing on the AWS store, but it somehow made a few cents.

I'm still nowhere near wanting to quit my "day job" for it.

Shameless plug: https://arbitrand.com/