Scratchpad not retrieve product information anymore, - Amazon Associates - Request Throttling?

I am getting this error: "The request was denied due to request throttling. Please verify the number of requests made per second to the Amazon Product Advertising API." . it was working okay for me before but it stopped all of a sudden.

• Are there limitations to the number of requests you can do in Sctrachpad?
• What are some other ways to get Amazon product image on my wordpress site?