No, I don't think they receive residuals from DS. IIRC, this came up in some other thread a while back.
Back in the 60s, most actors didn't think about putting residuals in their contracts because there wasn't really a market for reruns like there is today. And certainly, no one that worked on DS ever thought it would see a resurgence in the 80s and 90s, with reruns and the VHS tapes from MPI, as well as now with the DVDs from MPI. Because they never thought DS would be seen after it went off their air, and because most soaps (until Soapnet that is) didn't ever show reruns of their episodes, its safe to say that the residuals clause was not in any contract.