I am really wondering how big of a market of potential customers for private jet bookings there is. Whenever I think of private jets, I think of the richest of the rich and I have my doubts that they really need a platform like TapJets.
Take a look at this reply from page 4 it may answer your question:
https://bitcointalk.org/index.php?topic=5119445.msg50224296#msg50224296Cheers