Really?
What about insurance in the event of a Data Breach or the Company providing your Cloud Service going out of Business?
Currently you carry 100% of the risk of the results of a Data Breach which can add up to Millions of $ in the event of you being Sued for allowing that Data Out with the Cloud Provider at best only being responsible for the cost of the Service Period that the breach happened in currently that is a Months Worth of Cost but that figure could drop to a week or less when Cloud Providers see a benefit for themselves.
Also in the event of your Cloud Provider going Broke and this time it will not be the Dot Com Bubble but the Dot Cloud Bubble who owns the Data Stored on the Broke Companies Servers or the Servers that your Cloud Provider has Licensed from another Cloud Provider?
Can you in any way access the data that you put there in a case like this?
In the case of your Cloud Provider On Selling Cloud Services from another Cloud Provider will the Bulk Cloud Service Provider even deal with the Broke Companies Clients or on sell the data to who ever offers to pay?
The supposed Cost Benefit is at best extremely marginal unless you chose to ignore most of the Factors which is never good business and those factors are the ones that the Cloud Providers
Do Not Talk About. Of course if you believe the Marketing people who sell Cloud Services you are very likely to be one of the many companies who do not survive their first year. So looking to fail to begin with is a good enough reason to me to
Not Start in the First Place. 
Col