There’s plenty of entertainment to be had from naïve automated advertising algorithms such as that used by HyperDictionary.

The technique is simple: search for something that people really ought not to be selling—preferably something illegal—and browse the sponsored advertisements offering that thing for sale.

For example: child slaves:

At eBay you can find practically anything, even child slaves.

Somehow, I wouldn’t be entirely surprised, considering some of the weird stuff that’s come up there in the past. I suspect, however, that it falls foul of their terms and conditions, and I’m sure that eBay would be none too pleased to see it.