Ah, web ads.
"This is note a joke - you are the 10,000th visitor!"
OMFG! ORLY? SRSLY? OMFGWTFBBQ.
Yeah. I don't think so.
"This is not a joke! You are the 10,000th visitor! Who cares, you could be the 39090850230984792837678th visitor, whatever, just PLEASE let us destroy your computer with terrible terrible viruses!"
I still wouldn't click it, you know, but I'd appreciate the honesty.