Haha that would not make much sense to support known bands.
They already achieved what thousands of talented metal bands want to achieve.
ASP has got pretty everything. Record deal, huge tours with very famous bands, lots of fans.
So it makes more sense to offer a platform for those who are still small and waiting to be discovered.
If we wanted to support all nice known bands there would be like 200 or so :-)
anyway: ASP rules