DAS = Dave's Appalachian Swirls, which is Dave McCullough's current operation. They're modern marbles in special investor runs, continuing a tradition that Dave started when he was at Jabo.
Don't know about "sponsored". Is that showing up on the DAS listings? Then that could be the name of the group investing in the run.
As to Ruby Bee and such, a lot of sellers see a catchy name and then wrongly apply it to their marbles. Little rhyme or reason, buyer beware. @wvrons would be a good person to talk ghosts with us. I have a vague idea involving the cloudy translucent glass -- ghostly right? -- but Ron has specifics.