The decision by AOL to buy The Huffington Post triggered a flurry of commentary this week, with some calling the purchase a desperate “Hail Mary” move by the once dominant online portal. Others accused Arianna Huffington of selling out the legion of bloggers that helped make her six-year old site one of the most influential news outlets in the US and abroad. 

Some have also questioned whether acquiring a site with only $10 million in annual earnings for $315 million makes ...