According to TapJets' response, these were unpaid test flights undertaken for friends and family during development of the app to test it. And it's a side of their business they don't engage in anymore, acting more as an Uber/Airbnb matching agent: https://www.tapjets.com/Home/Article/tapjets-answers-recent-...
That changes nothing, and makes it no less reckless. Airline regulations are written in blood.