Again, you do not show the algorithm with which you calculate results, so the game is unverifiable and therefore not provably fair.
How did an 'independent 3rd party site' know how to implement the PF without having access to the code? Very independent and third party indeed

While I generally agree that you should not need to have a 3rd party site show that you are fair, this really is the same as having 3rd party auditors do your RNG, which is the traditional model for casinos so yeah I agree, PF should be independent on your own as the players.
I admit I haven't tried to see how this works at Betcoin though. Let's see if they come back with an explanation.