The HubPro very soon will not be optional. March I believe will be that change. The criteria for Amazon capsules is more stringent today. The product must be clearly relative to the title and content. And, there must be a minimum of 300 words about the product and recommendation.
I cannot really comment on HubPro much from personal experience especially with Amazon capsules. There are more experienced Hubbers with knowledge at the forums with experience how to use Amazon capsules with ins and outs about them. I suggest posting at:
Forums default page GoTo HubPages Community → Getting Help from the HubPages Community . . . to post a question about Amazon Capsules usage.