Careful with SpankBuxx. I've told them several times since July that they have traffic leaks on their affiliate tours and they've indicated them have no intention of removing them.
For example, the
spankmybottom tour has links at the bottom of the page to the
spankmybottom.com/blog/ and the
spankingonline.com/blog/ which are filled with outgoing links to other sites, and with links containing other affiliate codes.
Most of their affiliate tours link to one or another of their blogs, all of which have the same traffic leak problems. Sometimes the links are at the bottom, and other times, like on their
girlsbottom.com tour, the links to the blogs are at the very top of the page.
Of course if you're converting well with them you may not care. Otherwise you may want to consider how much traffic may be getting lost to those blog (and other) leaks/links.