Disclosure: I own a Bitcoin casino. I'm just replying to this thread, because I think there's a certain amount of misinformation, or at least lack of definition on what a Bitcoin casino is.
Dealing with the question of trust, broadly from what I see, Bitcoin casinos fall into three groups:
a. casinos on a shared platform i.e. SoftSwiss, the one I am on
b. ones that are on their own platform
c. ones that use their own games and therefore have complete control over the outcome of the game
The platform casinos
these typically use games from third-party providers like Microgaming, Netent, Endorphina and so on and use a central platform for transactions, licensing and customer services. These casinos have no control over the house edge that is set by the game provider. As long as there is some kind of test certificate, perhaps from iTech labs and there's a decent trust footprint on the forums i.e. that casino is getting out and about and has real and accountable people behind it, to me it's a trustworthy casino.
Generally I would say every casino on the SoftSwiss network is trustworthy. That's because Customer Services are centralised and ultimately the white label casino doesn't really have control over cash out decisions. So if there's a problem ultimately that stuff sits with SoftSwiss. Generally they have been extremely good on their decision-making in contentious situations.
The difference between one platform casino and another comes down to strategy on giving bonuses away, the websites they want to wrap around the games and the tone and feel of the brand, along with community engagement. And a number of other small variations. For my part, we've separated our website from the SoftSwiss platform as much as we can so that the site works better for finding games. Essentially it's taking an e-commerce approach to I'm online casino.
Casinos with their own platform
BitCasino.io is a great example. They are an excellent business, Tim Heath the guy who owns it plays a very straight game and in my opinion they are very trustworthy. Having been around for a while on the Bitcoin casino scene and being very careful about reputation I can say that on the whole if a casino has a bad reputation on the forums and it's not just one person screaming, it's worth taking note of.
The main assurance you will have with casinos on their own platform is the games they provide. If those games are from a game provider that distributes those games to other sites, then that's a great assurance the games are not rigged. The only question is whether you can cash out without hassle if you win. That's where reading the terms and conditions is very important.
Casinos that have their own games
This is where being provably fair really counts. If a casino has its own version of [whatever game] and it can't present a certificate from a company like iTech labs or demonstrate its provably fair, then yes I would not go near it.
Summing up
there's a real misconception that any Bitcoin casino that cannot show provable fairness is rigged. Not true. If it has got games from the central game provider and their online reputation is good within the forum community, then you're most often okay.
Also as a side note, the house edge per game is generally available. If you're interested, we've done a list of all games from game providers who accept Bitcoin and listed their house edges here: we are getting iSoftBet very shortly and I do also want to add in Netent and Microgaming games even though the not Bitcoin. If you care about house edge and probability, using a table like this is very helpful because there is reasonable variance between one game and another.
http://kb.oshi.io/kb/what-is-your-rtp-return-to-player-per-game 
