I think you are maybe under a misapprehension here. To use SAS Studio, you need a functioning copy of base SAS somewhere, whether that is on your own workstation or a server. It will therefore give you access to all the functionality that you get from a Base SAS installation. In the latter case, you would require an installation including the SAS mid-tier server products.
SAS OnDemand for Academics is a free, online service. As far as I'm aware, there are fairly tight restrictions on data sizes. Not quite sure what these are though.
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