It is in the friends only launch and the first 2500 people
to join and upgrade get free VIP membership. So what
this means is that I was one of the first to receive an
invite and upgrade... Now since I've been on this forum
I have enjoyed the posts and discussing a thing or two,
and thus am privileged to extend my invitation:

http://www.apsense.com/invite/rejoice

Come and join me and I wish you all the best of luck
to secure your free VIP upgrade. To cap it off they
have integrated a similar system to Adsense where as
a member you get to advertise to the whole network
for free with your membership points... there is one
more goody they have up there sleeves for now, but
I'll let you figure that one out