What my reports prove is that MFA's are rampant and in my case do a hell of a job at converting. Now you know why G keeps them on board. The "cleanout" from June 1st was probably MFA sites that were poor converters. In my case the non converters were myspace (no surprise there), digg and youtube. All in the junk filter. Most users will never use this feature but if they do some big names will take it in the balls and a percentage of G's income.