Personally I'd theoretically be ok with having contributed long ago, and the company now going SSPL. Not that easy to have known, that far back, how things would turn out.

> need to stop Amazon or they might not survive as a company

They make lots of money, but also have high salary costs, right. I wonder if you looked at the numbers and growth / profitablity, and concluded that they're at risk, or if you're assuming