Well, to be picky, Branson didn't technically go 'into space' anyway and the zero-G's he and the crew showed off was actually parabolic zero-G (the gravitational effect due to the craft falling back down to earth).
Anyways, I do not think that they deserve to be titled as Astronauts. How long did they train to go up? Do they have a distinguished service record like the majority of those who make Astronaut status? Have they conducted any scientific experiments that have changed humanity?
To me, 'real' astronauts earn their place and title, not 'purchase' it..........