Thanks to everyone who followed an amazon link from one of my booknotes last quarter. You just bought me these lovely books!
The etiquette of this sort of thank-you is tricky. On the one hand, you aren't supposed to talk about the dollar amounts -- in the case of Google ad words, you aren't permitted to do so. On the other hand, it seems wrong to simply say "thanks" and leave readers wondering whether they bought you a Porsche or a pastry.