Yes, quite inaccurate comment from INKJET.
The gap that now exists at airports excluding LGW, is afternoon/ early evening flights to the Costas. Not everyone wants or can get to a flight at 06.00. Norwegian operated flights in this gap at Manchester as did Monarch. Together they are a big loss. Such flights are needed all year round.
Additionally comments about Norwegian's lack of advertising seems to be something common to businesses run by people from that area of Scandinavia. For example; A restaurant here which has had a good reputation and name for years, has changed hands and name. No advertising has or is taking place. Even the sign directing you to the restaurant has gone. They are relying on word of mouth.