With so many changes in the networks that online businesses are advertising with, a lot of online marketers have been affected by this but are still trying the best that they can to be competitive despite with the said changes.  Take for example Google Adwords.  The thing is, they have implemented some kind of system where in a number of occasions the ads shown are not that relevant to the ones that people are searching for.  In effect, the ads have a lesser amount of click throughs.  The conversion becomes nominal if this continues.  It is kinda hard to figure how advertisers still manage to pay for PPC ads where they will only be getting a small return out of it.