Is this normal?

My porn site got 20,000 views today. And 540 of those people clicked on my affiliates link. 163 of them hit the join button, but none of them actually signed up. That's 0:540 conversion... Is that normal or really bad?

My affiliate is Pimproll. My site is lesbiansalldaydotcom and most of my traffic is coming from a gallery I have submitted to an adult directory. :chicken_w