Do you have concrete examples of successful business cases in which Cloud computing contributed to reduce Infra cost and reduce Time to market?

 yes of course there are many of methods that we can reduce the costs through it for example :

theory of constraint (TOC) that is focuses the resources on the most weakest point in the production process and try to up its capability and then there are another point will appear we focuses our resources on it 

the second method is just in time system (JIT) this philosophy focuses on inventory elimination the third is outsourcing

and there are more than one method that reduce costs in different ways and recent