7k clicks on the blog page, or 7k clicks sent to Amazon?
Either way, low conversion means that:
1) Your traffic is spam/ not targeted / unrelated to the product
2) You are providing the wrong content / misleading your costumers
3) The product isn't that good.
I suggest to take a close look into that. In the same time, put at least another ad of other product. That way you can compare the conversion of two (or more) products, and see what's better for you.
Good luck!