The moderator posted the reason why he did what he did, and it sounds, well, reasonable.
Basically, the mod got tired of deleting the same question over and over (the eternal September effect), so, as a compromise, and even though is technically against the rules, he stickied that question so others just go there instead of asking the same thing again.
So, the mod didn't selfishly ask the question for his own personal benefit. He just compromised for the greater good, it seems.