Quote Originally Posted by Renton
A couple reasons:

1. This is somewhat paraphrased from Theory of Poker. The larger a pot is, the more profitable it is to take it down without a fight. With a hand like AKo, you stand to win around 4-6bb with each pot on average. So if you take down a pot with a bunch of limpers with a strong raise, you stand to make about what you'd normally make with AK, a good result.

2. If ther are five people who call the bb, and you raise your normal 4-5x bb on the button, the chances are good that you'll get too many callers, because of the pot odds you are offering are irresistable. With just about any strong hand, you'd prefer to create a heads up or three way scenario.
thank you sir. Is this how you make all your raises preflop? Is the extra per limper based on the small blind?