Facts?
Point taken about passenger feedback, but the feedback and maybe the passengers themselves are "Self selecting". The sort of people who react positively about LOCOs are probably the sort who want what the LOCO provides, not just cheap, but the matter of cabin baggage, "unwanted" refreshments etc. and not so worried about ticket inter-availability, through ticketing, baggage charges etc. Of course such people are going to give "positive" feedback.
When people ask me my age, I say "Old enough to remember when Air Travel was comfortable", perhaps there is a whole new generation who don't realize how comfortable and pleasant travel by air was forty years ago, and could be again without inflating everyone to first class or business fares.
The Rip-off nature of LOCO ticket web sites has even been noticed by Normal (i.e. non-aviation) people are prepared to believe that these carriers will, eventually, even charge for the Loo!