From the news story :
At the Ryanair desk they said there were no available flights before September 15
Checked CCS-CRL today (13 September, afternoon)
Tomorrow 14 Sept : seats available EUR 159 single
Day After 15 Sept : seats available EUR 159 single
As the story was about an event a week ago or so, I am presuming there were available seats in the intervening days as well. But maybe they just "weren't available" at the fares those stranded passengers had paid. Does Ryanair's interpretation of rebooking only run to seats at the original inventory price the passenger has paid ?