What ad service are you asking about? I know with Adbrite it only shows up once a day per unique user.
I assume you are referring to adbrite. Full page ads is CPV = CPM not CPC. You can set the preference to daily for each visitor.
But I heard of people on here finding fiull page ads on ad brite that were worth 50-100$ per click? Is there any truth to that?
My history with Adbrite was $0.75-$2.05. I guess you could make 50-100 if it was a CPL/CPA and the advertiser was willing to pay that much. I haven't seen anything like that though.