@GlassAcres that’s a very uncomfortable feeling indeed.
I think it is important to share your original Topics to demonstrate just how long you’ve been working on this and the content of that work:
It’s a very rapidly evolving space with a lot of money and resources being applied so situations like this are bound to happen.
Monetising and protecting your work as a small/one person company is very challenging. I wonder what was in the T&C’s for plugin writers?
What I would do in your shoes?
*. I would consider open sourcing your plugin (if not already the case) and posting it as a repo. That way you have gain some value by association of the code and you might pick up some business that way.
*. Perhaps you could apply to join one of the teams working on a similar product at one of the well funded entities like OpenAI. Your experience would seem perfectly relevant? I imagine the salaries on offer might well exceed your plugin revenue and then some.