How large are their resources? Keep in mind we are talking about clod computing here where the big 3 themselves should be doing 60-70 billion dollars in sales yearly, so large has to be relative to the Industry.
So Amazon is double in size overall. It's not an impossible thing for them. That being said, I think their current ambitions are more limited by just running their own infrastructure.
However, I've never heard of them venturing into tech, although I guess it's possible. Walmart is pretty solid when it comes to tech, and there's certainly enough talent across Germany and Europe.
edit: we all answered together!