If it solves your problem, why would you care about what other people do with it ? Free software isn't charity, just a way to find allies - usage by other people is a side effect which doesn't cost anything to the project and is entirely irrelevant apart as some input for the user-to-ally pipeline.

Have you ever spent a huge amount of unpaid time to create an innovative, successful open source project and then had it forked in this manner? If not, I don't think you can accurately predict how this feels. Especially if the forker takes credit for your work, raises large amounts of venture capital, and uses their fork in a way which directly competes with your original project.