Except many Kama'aina have already picked up the Alaska Airlines & Hawaiian Airlines credit cards, so they don't pay for 1st bag anyway.
I should probably stop posting here, I mean, apparently I'm making everything up about waiting hours for cars (happened to me repeatedly, and even over Christmas was told in OGG it would be 2 hours for my car, as a Presidents Circle member @ Hertz. Its happened SO MUCH that I now have 2 car rental reservations everytime I come over (4-8x a year) - one with Hertz, one with National - at least ONE of them won't have my car ready no matter what time of year). I'm also making it up that most airlines are fairly empty to/from Hawai'i. And I guess I'm making it up that my friend just bought a ticket from Juneau to Kona for $209 one way, and another friend for $200 from Denver.
So market plateau and saturation are ONLY in my head and just my head... WN's entry to Hawai'i is about ego, and not to make money.
I would argue it depends on the time of year you're visiting as well as the time of day and even what seat you're sitting in on your inbound arrival effects on how long it takes to get a rental car. I rent cars frequently for interisland trips, and my experience is vastly different than yours and I have no status with any rental agency. This is mostly because I arrive before the first mainland arrivals. Most of the Hawaii airports see successive mainland arrivals in a short period of time which floods the rental car companies with customers. If you are not one of the first off the plane to rush over, its only natural you'd have to wait as hundreds of people are picking up rentals at the same time. If you came over Christmas did you expect to be in and out in 5 minutes? Christmas is a peak travel time.
Additionally, you providing us anecdotal information about friends who purchased low price tickets without providing key details about the dates of travel or how far in advance they were purchased doesn't tell a complete story and reads more like you manufacturing a narrative to prove points you've made up thread. Tickets purchased many months in advance will often be cheaper as there is more available inventory on that flight and tickets purchased for off-peak periods will be cheaper than high demand periods, like Christmas, Spring Break, Summer.
I'd also ask you to define fairly empty. There are several sources online where one can retrieve load factors by airline to/from the Hawaii market. The last time I looked, most airlines were in the mid 80s for LFs. I Is that considered fairly empty ?
Lastly, I have a heard time believing that a for profit company like WN has lasted as long as it has and has been as successful as it has by operating routes at a loss due to ego. The fact that you seem to think this puts into question many of your previous statements in my opinion.