Backov,
Your math is not possible
First off 100 first time signups do not retain for 3 months.
As well sites with trials convert better than sites without trials. Which is why most programs run trials.
Running with trials allows you to have more signups which allows you to move more credit card holding traffic that will buy porn to other things or other sites that you own.
My math is rather simple and about as correct as it comes. We ran NO trials for the first 2 years of our program. After we changed to trials is when signups and money started going nut's. You push an extra 50% member base (even if a good % quits before the trial) you will make more money.
If your example was true I think every money program on the planet would drop trials. Reason we don't....More money with trials.
Not sure where you get the problem with the math. The math is in the conversion ratio. Trials convert better. Same thing of why Roger offers $1 1 month trials..Push a huge ass amount of members through the system
Better ratios make him more money.