In limit holdem games there is no need to keep players in the game by offering extra buy in or rebuys.  Most of the limit holdem games are those without a rebuy because the higher limits of betting in such cases can be predetermined and buyers can usually plan time ahead the maximum number of chips that will be needed.  Also, limit holdem games give best results when they are played straight rather than with bluffs.  The result of bluff can still work winnings, but bluffs are less worthy in limit games when compared to no limit games.

In limit holdem if you are going to rise with a big pair like KK or AA then your opponents are likely to guess that you are raising the pre-flop because you are holding something big like AA or KK.  This is like leaking a lot of information much to the disadvantage of the player.  In such a case they are likely to call with worse hands because they know that if you are going to hit a bad flop you will have a tough time folding your big hand, they do all the calls expecting to hit on a good draw; however, in such a case even if you are going to make good draw you will win and many tight players would have folded early and your winning will be minus those bets.  Had you bet less, the tight player would have stayed on.