The other day I was launching a piece of linkbait to promote my software. I tried promoting it through a campaign on Stumbleupon, which lets you show the advertisement only to certain demographics. This made me practically scream with joy -- I immediately restricted it to 25-99 year old ladies.
Then I realized "Wow, that is probably pretty rare for software companies". But that is, judging by customer contacts and names on orders and credit cards, about 95% of my business.
Anybody else here in my situation? Got any tips, tricks, etc?