NOC-BRS has been operating every summer season since 2008 - some years 3 x weekly, others 4 x weekly.
Ryanair operated SNN-BRS from late 2005 until 2009 before ceasing it for the reasons Marko points out.
In its four full years of service from 2006 Ryanair's SNN-BRS carried 97,000, 97,000, 85,000 and 81,000 passengers respectively - courtesy of CAA stats. I imagine these passengers didn't consider the route to be pointless.