I thought the whole idea of GPL was so that no anyone could provide support to the same code - increased competition benefits customers. So seeing people calling Oracle parasites is not honest and goes against GPL spirit. If Red Hat wants to compete with Oracle it should do it on the grounds of better support not by using such, dare I say, underhanded tricks. It absolutely does not matter if Red Hat did all the work. If you don't agree with GPL and its effets maybe you should not use it to licence your code.