Membership Pro 2 Free Trial feature doesn't request paypal payment info

I just had three customers signup for my service using a 7 day free trial. I just tested it myself and the process completed but i was not asked for payment information and each is set to Free Gateway. Is this by design? It is a "no credit card required" feature? If so, not a big fan and would like the choice. Membership 1 allowed moving from Trial level to Paid level but required payment info in the beginning...