Hmmm, hate to be the cynical one here...but maybe the advertisers used the misplaced punctuation or poor spelling on purpose? After all, the goal of advertising is to attract people's attention. Maybe some clever ad agent thought that they would differentiate their ad from the myriad of ads surrounding it by inserting poor punctuation or spelling mistakes. People would therefore immediately pull-up and read the ad as they subconsciously detect that something about the ad is demanding their attention, or "not quite right". The conspiracy continues...
