Congratulations.
I still haven't gotten mine... yet.

Questions though.
Do you buy a lot of games in the PSN?
How about just downloading a lot of stuff off the PSN?

I'm curious to know if that matters.

I doubt you have to buy a ton of stuff to get it, if you download lots of things and are on daily, you have a chance.

Dunno, maybe Sony thinks people who buy more PSN games are more dedicated to games and more interested in betas compared to the one's that don't.
It may also be a "thank you" to people who support the PSN business. 

Yes, I've downloaded tons, and bought an embarrassing amount of stuff from the PSN. Singstar alone (for my wife and kids, honest) accounts for far more than I've paid for the two BDs of the game plus some. If that's made a difference, however, I'll never know.

Thanks for the info.
And that's a lot of songs. O_O

I cant use my ps3 atm cos im away, so u think if i got an invite it would be terminated or summit like that?