If you aren't paying for the product, you are the product. It is true. But now, so many applications are based on these monopolistic API, which can change terms and conditions and pricing at any time. More than 1 000 000 3rd party apps for twitter, even Google maps changed pricing recently. It is about charging money, but also about policy and involvment to developers, viable business model and company's roadmap. But without any "rating" how would you manage your cloud supply chain with thousand of APIs?