If you are on Twitter you've probably been spammed by ads for Maximum Shred or Extreme Deer Antler. Please don't fall for the scam. Before you go giving your credit card info hoping for rock hard abs or losing 30 pounds in a month without trying - read this Men's Health forum on Maximum Shred and Xtreme Deer Antler.
The charging your credit card before the trial is over, purposefully making it hard to cancel your subscription and the charging of your credit card even after you canceled reminds me very much of the Enzyte Federal trial and indictment - basically the same business practices.
On a lighter note - here's my thoughts from 2004 on Smiling Bob the Enzyte Guy.