Does anybody have good data on conversion rates for credit card info at the beginning of the free trial or end of the free trial? That is, let's say you e-mail the user 5 days before the 30 day trial is over in both scenarios, but if they entered the credit card info beforehand, then to sign up the user has to do nothing, but if you require it at the end of the trial, they now have to enter credit card information to continue. So basically you have to add the credit card burden at some point; do you get a higher conversion if you increase the barrier for the trial (by asking for cc info up front) or the barrier for continuing (by asking for it at the end)? I'd guess that asking up front has the higher conversion, but I'd want to see the data.