If at First You Don’t Succeed, Write a Check - New York Times

Interesting times -- also see BusinessWeek's lead story for the week, "Is Google Too Powerful?"  

Watching your principal competitor widen its lead with organic growth, unaided by advertising, makes you receptive to trying something else — anything else. Microsoft has decided that the search business needs a sort of “frequent flier” rewards program to attract and hold on to users: Microsoft Service Credits for Web Search.

Source: If at First You Don’t Succeed, Write a Check - New York Times