I can say that price _increases_ happened for a few AWS products in specific regions/countries without blog posts. Often AWS simply emails affected customers 1-

I can say that price _increases_ happened for a few AWS products in specific regions/countries without blog posts. Often AWS simply emails affected customers 1-3 months in advance and after making the change. That said, I imagine prices shifted due to currency, labour costs, energy costs or other regional concerns. And I’ve seen the opposite - I’ve seen AWS freeze prices and eat the cost differences long after they should have raised costs. It varies by product and region and marketing strategy, I expect. The only rule of thumb is what is posted on the pricing page is supposed to be what you get charged. No APIs exist for the most part, and the actual charges can sometimes differ anyway (e.g. grandfathered pricing etc.)