[Myztiq]

I'm not entirely sure myself, a few guesses.

  * Cost based configurations
  * Putting high compute in one cloud and storage in another? 
  * Perhaps to handle entire cloud outages? 
  * There may be features that don't exist across all the providers that people may want to take a dip into.
  * Integration w/ existing frameworks, AKA code deployed to multiple clouds that need to be supported.