If we review a book, we probably got a free copy.
If we run an advertisement, it's an advertisement (dur), and we probably got some compensation for it. Hint: if it's an ad for someone who contributes here, the compensation was their contributions. If they don't contribute articles, we probably got some cash. Or blowjobs. Probably cash.
If we link to a product on Amazon, we get a cut of any sales resulting from that click (not just the product linked to, but anything purchased during that visit). And if you want, you can try to get a piece of that money back by participating in our Drink What You Kill contest.