I guess I shouldn't be surprised that most of the responses came from people who are so desperate for money that they add advertisements to their signatures. Bumvertising at it's finest.
Well, the ad sigs are the main source of BTC for me since I don't buy it. Just because we're able to turn our hobby into profit and there are a few particulary annoying bad apples doesn't mean it's bad on the whole.Considering every single gambling service on the Internet is a (more or less significant) scam, advertising scams isn't exactly what I call a "sweet apple"
(but it's not uncommon for people without principles to sell out their souls for the prospect of a few pennies - they're the vast majority in the BTC world)