Running it right now. Remember it is a BETA. Which means that it can and will cause crashes and some applicaitons will not work right. Unless you are familiar with Beta testing and understand what is involved. STAY AWAY FROM IT.
The only way they would is if you sent them feedback. I wasnt invited and i have already sent in about 6 different bugs i found. So they know that i am not in and sent info. What are they gonna do? The worst case thing is they blacklist your serial which i highly doubt. The best case you get a invite.
For them they dont care cause it is more feedback overall as to the stability of the SP and the Beta. So for them the feedback can be used. For us they just know we run it when we are not supposted to. Meh. I dont care either way.