Your comment made me realize that while I click on ads on Google all the time, I have never clicked on an ad on Facebook.
I don't have a really good explanation why, except that maybe the ads I see on my Facebook pages seem to have a 'scammy' feel to them (the most common ad I see is for Canadian Pardons - Facebook must think I'm a criminal).
since most Ads dont work, and people advertising "healthy food" and "local plumbing" figured it out already, the only one truly left are the advertisers that make money of ripping off innocent or unaware people: ads such as mom that makes $150 per hour, amazing cream for deep jungle that makes grandma looks like shes 30, pills that will let you lose 50 pounds in 1 week, etc.
I don't have a really good explanation why, except that maybe the ads I see on my Facebook pages seem to have a 'scammy' feel to them (the most common ad I see is for Canadian Pardons - Facebook must think I'm a criminal).