Those are all sub-par cloud technologies which perform very badly and do not scale at all.
Some people would rather build their own solutions to do these things with fine-grain control and the ability to handle workloads more complex that a shopping cart website.
I've tried to refrain from commenting but your comment pushed me over the edge. I either want to dismiss your comment as ignorant that amazon is just a shopping cart or ignorant that you even need cloud technologies until you have 1000s of customers. But I must concede there's a chance you fall in that middle area and I'm wrong. It's < 5 percent. But yeah sure.. we have a scale problem and you're right you've identified the nonsense cloud technologies that won't fix it. I'm glad you chimed in to convince us but to build our own for 5000 customers.
Some people would rather build their own solutions to do these things with fine-grain control and the ability to handle workloads more complex that a shopping cart website.