Is DING useless from the east coast?

So, I've had DING for almost a year now, and have never, even once, seen a Southwest flight to Vegas from Florida or anywhere else on the east coast. Is it useless for us Floridians who are looking for bargains to Vegas?

Same with me, have had it close to a year, and yet nothing from Minneapolis to Vegas.

It's almost all short runs, Tahoe to Vegas, Reno to Vegas, Phoenix to Vegas, etc. I think the longest haul I've seen is Albuquerque to Vegas. Might be time to 86 it.