I guess it's somewhat interesting that AdWords can confirm what are good titles and what aren't but I could've told you at the outset that the first two titles are vague meaningless titles that won't draw anyone's attention. "The last frontier in payments"? Really? I know I wouldn't read that because it sounds like marketing BS.
Also, reaching the front page on the weekend has a lower barrier to entry. I see posts with 13 votes hang around for hours.