That's exactly what I'm saying. There are pilots in Maun, on license validations, flying aircraft that they had never flown before.
Further info for you from Mack Air's Facebook page a few months back:
MACK AIR IS LOOKING FOR CREW FOR 2015.
We are looking for pilots with a minimum of 500 hours and both C206 and GA8 ratings appended to their license and/or entered in their logbooks. Class Rating's will cover these aircraft.
No mention of time on type there.
If the word of a stranger on the internet doesn't satisfy you, contact the companies directly.