Can you deliver pizza's at night? Why can't you do another dev job? Sure there's risk, but the calculus is: $100k a year or $200k a year? Retire in 30 years or 10? I've had lot's of jobs that didn't even make me sign a non compete.

Depends on your state.

In places like CA, you'd probably be fine to offer services to a company that's completely unrelated to your nominal employer, as long as you don't use privileged information from your "main" job.

That being said, have a friendly chat with your own lawyer before doing this.

Only if you actually violate the non compete (and even then it will be state-specific).