And to think the OP did all this for just 21 mBTC which at the time was around 200€ even though Sportsbet had already returned their original deposit of 427 mBTC.
I have no idea why the OP played this game with forum members and with Sportsbet.
They do so because they see an opening. Probably not entirely related to the fact that there was trial run at forum members performing binding arbitration, but could be why it's so heavily weighted to sportsbet. So if you are a multi-accounting scammer, why wouldn't you take a hail mary that doesn't cost you anything but a few minutes time, and barring undeniable evidence gives you a shot recouping fraudulent funds.
It's pretty rare someone goes "Oh well, you got me. I'll go away"
I like the way you articulated this point. When a precedent had been set about allowing forum users to act as arbitrators then it regardless of the outcome being in favour of the casino or the user - it would open the floodgates for others to ask for copycat treatment.
Still, the amount claimed by the OP is just 21mBTC, it is a tiny amount yet he went through the whole drama of playing the victim and accusing Sportsbet of cheating him just to try to get that money. It is a really silly thing to do in my opinion, just does not make sense. Maybe the OP hoped Sportsbet would give in and pay what was being claimed in order to avoid negative publicity but they did something that the OP did not expect.
Sportsbet dug their heels in and stood their ground against those breaching their ToS and did it as a matter of principle regardless of what allegations of BTC amount were being made against them.