I'm confused as to why a recent certification failure got a failure. They didn't say much other than:
"Your skill content does not qualify for the Amazon In-Skill purchasing service. Please remove in-skill purchasing functionality and resubmit."
But there are similar skills that got approved that I read on the blog and followed like so: https://developer.amazon.com/blogs/alexa/post/04bb2b8b-0a94-443b-a378-2de443779a64/invoked-apps-adds-in-skill-purchasing-to-fuel-growth-and-financial-success, so I'm surprised mine isn't getting approved. After a year of work it would be nice to get more information instead of an auto response, but doubt I will get answers.
Note: There are 140 ambient sound skills with ISP, 3 were approved in the last few months.