Why are there ad's on blogs???

If it is a "blog" why would there ever be an ad?  When "ad's" are posted on a "blog" then it is NO longer intended for "personal" or non-commercial use... as it is being used to generate review.
 
"Advertising may be described as the science of arresting the human intelligence long enough to get money from it." --Stephen Leacock, Canadian economist and writer