Then other customers would be worried and might decide to move away? That's the key difference here, you're paying for AWS, you're not paying for Youtube. On to

Then other customers would be worried and might decide to move away? That's the key difference here, you're paying for AWS, you're not paying for Youtube. On top of that if you find that Youtube doesn't pay you enough then... Well, there's not much you can do since you'll probably earn even less on other platforms. AWS on the other hand has plenty of competition, as long as you don't willingly lock yourself into their platform you'll be fine.