Many if not all larger Tier 1 and 2 companies (HY, Baulderstone, Built Environs, Badge etc ) will not allow any one on site with a white card obtained on line. Our company do not. Dont bother getting on line at all or you may end up finding your be restricted where u can work, there are reasonably inexpensive to get from places suchas Master Builders.
As for the pictures on the cards from as far as i am aware will eventually come out if not all ready as was an obvious thing to put on to the cards but like most things here never very well thought out.
As for use interstate white cards were supposed to do away with all the hassle of different cards that each state had, green cards, blue cards. They are meant to be nation wide.