Platinum is reached by purchasing 100 shows and as far as I can tell all you get is a different colored star ... lol, although at the platinum level you can view and post in platinum only forums of which some contain tasteful nudity. You can also post pics with what they call tasteful nudity ... I don't know exactly what they mean by tasteful though, all the female nudity I ever tasted was pretty good ... lmao.
And also it was once said by someone here that when you reach platinum you also have the right to bitch your ass off about things that don't suit you ... lol
Personally, the way I see it, when you reach platinum level and above you can look back and say "damn, I've spent a lot of money here" ... lmao