> AWS will use commercially reasonable efforts to make the Included Services each available for each AWS region with a Monthly Uptime Percentage of at least 99.

> AWS will use commercially reasonable efforts to make the Included Services each available for each AWS region with a Monthly Uptime Percentage of at least 99.99%, in each case during any monthly billing cycle.... So to achieve 99.99% within a region, every component should have at least 3 nodes and to better it deployment should go multi-region which will escalate the costs quickly. Most application in reality don't even need four 9s so this works b beautifully for everyone. I work in outsourcing industry and in bad old days we had huge penalties and many rounds of explanations even for applications with no redundancy requirements ;). But it's just Amazon credit nowadays and no one blinks and eye so it's win win the all.