They know who you are, and they're probably insecure about their own success.
https://penguindreams.org/blog/why-i-dont-sign-non-competes/
I had a non-compete in a startup contract and I outright refused to sign it. I'm glad I did. They wanted complete control of all the software I wrote too (which up until that point had been GPLv3; all volunteer work). After the startup failed, my efforts in that contract negotiation paid off as I made sure I was allowed to re-release the software as GPLv3. It's currently used by students at the University of Dayton:
I would strongly recommend against remote work if you're plan is to learn about starting and running a company because so much of what is involved must be observed and isn't communicated. How does the CEO talk in group settings? How do they talk to investors? How do employees talk to each other, what do they think of their manager and how is that expressed in their behavior. This is a game of observation which you cannot do on the other end of a web camera.
You make the next minecraft and are making millions after a few months. You now have money to fight back with your own legal team.