Actually they are retiring the "Web and Business" pricing plans, which were charging for storage size and introducing a new pricing plan that charges for both s

Actually they are retiring the "Web and Business" pricing plans, which were charging for storage size and introducing a new pricing plan that charges for both storage size and "Database Throughput Units", which kind of obscures what they are charging for - something related to transactions volume and based on my experience with other "cloud hosted" databases, I can guarantee you that it gets pretty freaking expensive. The smartest thing to do is to never rely on a particular service of a cloud provider. For example we once made the choice of using Amazon's DynamoDB, which is great in the beginning, but at some points along with scale issues the costs went through the roof (DynamoDB also charges for "throughput capacity") and we just switched to Cassandra - but we planned for this migration ever since the beginning. And this is the problem with cloud providers - the pricing schemes on these services are designed to hook you with affordable prices in the beginning, but later on as your business grows they get much more expensive than hosting your own stuff. So use whatever makes you most productive, but careful about lock-in.