A fair point. But having the internet turn on you before you get any traction is also probably going to be a death-knell for an early stage company. It doesn't bode well for their ability to make or raise money.
I can't think of a more effective way to entrench a oligopoly: small companies get screwed because if they use open source the way the big girls do they get cancelled, and they can't get big because they can't use open source the way the big girls do.
The point is that you've specifically let people do something then when they do it you're upset they did it.
If you don't want them to do it, don't explicitly allow them to do it. There are plenty of licenses which would have stopped this.