It sounds like there’s a problem with having too many flights that are barely full and hence unprofitable. AFAIK the federal gov spends significant money subsidising many “small airport” routes even if they’re barely used.
Spirit and the other LCC’s problem is that the legacy airlines are now offering a similar product in their basic economy that has less hassle, higher frequency, is sometimes eligible for earnings on their massive loyalty programs, etc.
(Seattle is my home airport, so maybe this has something to do with it - but come on, SEA is no ORD or ATL...)
However, if you wait till your competition goes broke, you need to ensure you survive long enough and stay big enough so you don't get bought. That's not exactly easy.
Before them Alaska Air was similar, and is now similarly bad.
Having the customers actually own the airline seems like a reasonable approach. The trick is kicking all the assholes off the board, so they can’t fire leadership for treating customers decently while turning a sustainable profit.
I can't fathom how this airline was allowed to keep existing.
I wonder if this will be the next "market" to exploit if ad revenue ever dies down too much, or if it's one that's always been there, and I've simply never been a part of.