Card pulling is if you see you might have a big win (like u are dealt a quad or 4 to the royal) and then pull the card and keep it out while the win registers so your account shows lower win.
That is different from what I did to ensure points are registering. I just randomly pulled out my card, put it back in, so my card does show all the wins and losses (I didn't skip a win). So no attempt on my part to "falsify" my actual play or win totals.
Would card pulling actually help someone? Maybe, a little, but obviously if u do this all the time u would also skip putting in the money on the next hand, so your coin in totals would be lower, and if u did this a lot, your play would slow down. So I'm of the opinion this tactic is of dubious help in upping any comps you might get.
A better technique might be to "play" two machines at once. On the second machine just play slowly, even hardly at all, just to increase your total time playing on machines. This is because some casinos like you to play for longer amount of time, so your offers might increase if you show "four" hours of play, when actually you are playing two hours on one machine, while your card is also in the second machine with extremely little play. I've done that on rare occasions, just leaving a hand in mid-play for several minutes. You have to be careful that no robber comes by while you are concentrating on machine number one and removes your money from machine number two, and leaving a hand in mid play helps reduce the likelihood of someone cashing out when u weren't looking, because they can't in mid hand.