It seems like TapJats is attempting to use "private flights" to skirt commercial flight regulations (and the safety requirements that tag along). If this turns out to be true, they should be crucified.
Pilots without the required training will fly shotgun (and then low and behold, be required to assume control in a situation that requires it, exceeding their authority), pilots will scud run, or pilots will make other unsafe decisions due to a lack of training, and people will die.
EDIT: I'm mistaken if their website copy is accurate:
"Our partners require their captains to hold Airline Transport Certification and have thousands of flight hours before joining the flight team. First officers are required to have more initial hours than prescribed by regulation, and they are paired with experienced captains to ensure each of your aircraft is piloted by the best at all times. Pilots also undergo rigorous, airline-quality training conducted by Flight Safety International every six months, and Federal Aviation Administration-approved Check Airmen conduct line checks on each of our captains and first officers on a regular basis."
https://www.tapjets.com/home/safety