I had a 4.66% conversion rate for the last 10 days with Amazon. What's your conversion rate promoting products at Amazon?

I also built 2 new niche sites: standing desk and military fictions. I was planning to creating a book club script so I can build a lot of niche book club sites very quickly. However, I'm stuck with wordpress so far. It's not bad but it requires a lot of man hours. Maybe an automatic plug-in that pulls product information by the API they created for the affiliates.