Newb question incoming!

I feel like I've been looking and researching Ardor for ages but still don't understand the basic idea of BAAS. Why would a business want their own block chain and currency?  How does this idea transit into the real world? Is it just a way for new projects to gain from ICO crowdfunding? Is it a way for the business to take on its own currency that would be viewed as shares for its employees and/or shareholders? Can these businesses add and store data safely on their respective chains?