I'm not sure what you mean by having to spend money maintaining DynamoDB. What maintenance are you talking about? You definitely have to spend money designing

I'm not sure what you mean by having to spend money maintaining DynamoDB. What maintenance are you talking about? You definitely have to spend money designing your application and figuring out how to keep it cost effective, but once you have that set up along with the auto-scale policies, it is pretty much fire and forget.