I spoke with Redi last week. The Redi department is being spun off into a stand alone entity. They are now, even before the spin off, a broker neutral platform. So, a Broker Dealer can pay for the Redi platform, but not the DMA. Or, you can pay for the DMA but not the platform. Of course, you can also subscribe to both. You do not have to clear GS or GSEC anymore.
You can't do this directly if your "customer." You have to go through a broker dealer willing to have all the agreements with in place and is willing to offer it to you.
Bob