Your data may be anecdotal, but it's vastly more data than the paper provides (zero data to back up its claims). My personal experience with advertising matche

Your data may be anecdotal, but it's vastly more data than the paper provides (zero data to back up its claims). My personal experience with advertising matches yours. Likes on Facebook can come from the strangest sources, but the clicks on ads are mostly real users that fill out forms and buy products.