NRN had poor loads and odd departure times. I think it left NRN Mondays at 10:30 or so, so a coach from Duesseldorf and check-in time meant you'd have to leave central Duesseldorf at 6:30 or so to catch it. Not great, esp if you have DUS at your doorstep. Must have been more for the Dutch market. The german travel tax is just a cheap excuse. OltonPete's analysis when both HHN and NRN were still there showed NRN just above the chop-value of 70% load factor which FR applies, and HHN just below. Now FR introduce EMA-TLL, lifetime of this is 6 months maximum...