This pay2us.biz scam site appears to have been running a few years, way before even SFL existed.
They target adult affiliate sites by phishing credit card information, They then use that information to buy subscriptions to those sites they got the card information from resulting in a profit for them. This includes file lockers.
Here's a few people talking about it:
http://www.scambook.com/search?cx=pa...y2us&sa=Search
http://www.infosecstuff.com/affiliate-marketing-scam/
They have multiple urls for the phishing including the following:
pay2us.biz
pay2uz.biz
google-analytica.com
pay2uss.com
subscribers-care.com
mypa2us.info
p2yas.info
pa-2-us.info
pa2us.info
pay-2us.info
pay2uss.info
pay2uz.info
thepa2us.info
pay2us.net
pay2uz.net
pay2us.org