Purchased traffic sucks.

Purchased traffic really is a waste of money.

Don't buy it. There are much better things to do with your money. Like burning it. Or giving it to me.

No, seriously.

Even "targeted" purchased traffic.

Different paid traffic programs use different methods to generate the traffic, but rarely will it benefit you in any way. Any time I (and everyone I know, for that matter) have used it, the results have been the exact same: a large and sudden increase in traffic, and not one single additional sale. Unless you personally know someone who has had a good experience with a particular program, just don't bother. No matter how cheap it is.

You could spend your money on something better, like a well targeted CPC or banner ad campaign. Or just save your money and write an article. Haha, or better yet, waste your money on it, then write an article on why you shouldnt buy it, just like I just did :)