I never said forking is abusing. But if you fork it, position it as an official product with the same name on your platform and lie on twitter saying that your

I never said forking is abusing. But if you fork it, position it as an official product with the same name on your platform and lie on twitter saying that your foobar was a collaboration with the original foobar author then yes, you are definitely abusing your power. On the other point: "the GPL is working as intented" yes but not as the authors want, hence the change of license! Nothing wrong with that IMHO.