"I belive they hire DCA PFT pilots"
With all due respect, and I'm no fan of DCA, but it's not PFT. If they stay long enough to get the guaranteed interview, they have over Mesa street mins. As far as I can tell, Skywest isn't a big player in the DCA guaranteed interview scam.
If you are speaking of 250 hour pilots, you may be thinking of Flight Safety Academy direct track. Most of those guys go to ASA. They don't meet Skywest mins. As an aside, Skywest won't hire guys with "timebuilding" multi-time unless they have "good" PIC time to meet the mins. This is what I've been told directly from a line pilot who does interviews at Skywest.