The same can be said about using the Apache license and the service here in question. In fact, the difference is that it's completely legal.
The original authors don't lose anything.
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.
I don't think we should stone adulterers. But I also think cheating on your partner can mean you're an asshole.
-- Edward Thurlow
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.