You can both want a project to be usable commercially and still feel bad about being iced out by people who are vastly better off financially than you are. I had a big project for my Ph.D. thesis that was good enough to get spun out into a startup. They didn't even offer me a job.

They were under no obligation to, but it set my career back five years and I'm still angry about missing out on the obvious route from graduating to being really awesome at what I wanted to be really awesome at.

It's not controversial that they did this, I was a junior employee and they didn't have a ton of money. It still significantly damaged my career to be forced to start all over on a totally new thing despite literally inventing what they were doing without me.

Blame? There doesn't have to be blame for that to suck for the little guy.