I think he's referring to commercial support for a Python environment at cloud.sagemath.com, for which there is zero setup. Just go to the link provided. SageMa

I think he's referring to commercial support for a Python environment at cloud.sagemath.com, for which there is zero setup. Just go to the link provided. SageMath is also available there with zero setup. You don't need the Sage installation manual to use it there.