cc-billing, any difference between...
 

...a processor that asks the surfer all kind of information (phone number, streed adrress for example) and a processor that basically just wants to know the name and the CC#

does this affect signups?

you'll get more signups with the latter
and more fraud, charge backs, fees, headaches, pms cramping, hemerroids, start smoking and if you smoke, doubling the amount of cancer sticks you smoke...just play the game right...