It is easy to prove that Nitrogen Sports is rigged. Simply follow all the rules under “Basic Strategy” at this webpage:
https://en.wikipedia.org/wiki/Blackjack
The dealer should only have a .5% advantage. At Nitro, the dealer wins 75% of the time.
As a programmer, I can tell you that "Provably Fair" is a joke. It is easy for a website to modify their code and display anything that they want. If you want to see a rigged poker site, go to Betcoin.ag and play against any of the heads-up robots that are there 24 hours a day.
I challenge the blackjack sites to provide a continuous log file that shows all blackjack hands that are dealt, for all users that opt-in. This would allow players to prove that their bad luck defies the odds, and would allow programmers like me to see if the house is busting the normal percentage of hands.
I understand probability very well: I created http://poker.ftppro.com.