I swore when I revamped this website that I would post more often. Does once a month count? Okay, every two months... *blush*
I spent a lot of time in the past weeks testing the Amazon Cost-per-Click system (aka AMS ads). There are several blogs/post/forums on the subject already. The ones I found most useful are the followings :
The good point is that you can get some visibility for a token. However, don't expect miracles. Some categories (in particular Romance) are very competitive, so you need to bid high, for minor results. I think the trick is to get a lot of keywords (good luck with that one), bid low (0.05 to 0.10 $/click) and just wait. It also helps if your book is exclusively on Amazon and enrolled in their KENP system. You will earn some money from pages read. I chose to publish on multiple platforms through Smashwords, but I will consider the exclusive part for my next self-published book.