I found out last October that when you tip the dealer it doesn't go to that particular person. It goes into the tin, but at the end of the evening it is divied up between all the dealers. If you want to tip a dealer I would ask if it is given to that person or everyone. We were really bummed cause like Kuki stated you might be having fun with a particular "dealer". We didn't get along with all the dealers, but that is for another thread.
Wow, what diffence does it make if they "pool" tip or "keep their own"? If everyone thought like you no one would get tipped at all. Look, if you tip and the intended person gets a percentage thats a good thing not a bad thing and over time it is a win for the intended dealer. Having worked in "pool" and "keep their own" houses for many years, I prefer to work pool as dealers can run hot and cold ie they give it up or they take it and pool house lets all dealers enjoy a comfortable and stable paycheck whether hot or cold. Also, pool houses tend to be friendlier environment to work in compared with Keep their own as there is less competition for "good" tables and players. Very few casinos keep their own on dry land, none in Vegas and I can't say I know the percentages on cruise ships. Just my informed opinion.