We can vouch for VS
We've had them up since 2005 and our top 5 customers have spent over $80,000 - $73,000 - $61,000 - $55,000 - $53,000 since then respectively.
That's what I call retention (addiction!)
We are also very soon going to allow our affiliates to promote
IwantU Live - contact me if you'd like in to beta it before everyone else
Their team rocks, their girls rock an sleeping on their floor rocks
