At least they were nice enough to pay you a trip to Seattle and (briefly) mentioned your project in the release announcement, I didn't even get a "thank you".
As a result of this I re-licensed my code from MIT to OSL-3 and reduced my involvement in this project a lot so I focus on the things that actually matter in life: my wellbeing and spending the time with my family.
That's what I don't get about people who don't think this is a big deal. That a license is open source does not mean it is without conditions.
My former employer is still using it and saving yearly multiple times my previous 6 digit salary, so I got a nice promotion out of it before I left.
It also helped me get my current job at AWS(pretty much half of the interview I was just talking about how I built it), and I now make some $500 monthly (before tax) from a few users who pay for official binaries.
I'm now only working on it occasionally, just enough to maintain this income stream, but previously I put a lot of time and effort into building it.
My motivation to work on it plummeted when I saw those companies reap the benefits of my hard work without giving anything back.