I collect full books whenever I can, Barry. I like to save things as close as possible to the condition they were in when they were used. I'll take a matchcover if I think I won't be able to find a full book soon (or ever). The ERV cover I showed is an example. I probably have about 80% full books in my collection now.

I would not recommend removing matches from your casino matchbooks if you ever plan to sell or trade them. If it's just for your own amusement and convenience, shuck 'em and toss the matches.