Really it depends on where you see your SaaS career going to the cloud in the near future or if you want to learn cloud technology for the sake of learning cloud?
Of course doing the CCSP would provide a years worth of CPEs unto itself.
If you are working with cloud technologies, then absolutely. Should not be too big of an effort after completing the CISSP.
Is it worth taking the online coarse for CCSP , or did you just review the study guide? I already work for a SaaS company and have my CISSP so I am no stranger to the technology.