this forum would be the best place to advertise it with a signature campaign imo.

Its pretty much a necessity if you ask me since if there is no bug bounty system in place (or if it is not sufficient) the users who find issues would most likely exploit them, causing you or the players far greater losses.

yeah it would be really cool if you had awards for spotting the bugs and helping you out with the website

i think that there are already enough people who wants to try it out, also as someone already mentioned, it would add up to your advertising

will it be open to all people to test it out? i would be curious to check your website as soon as possible

What is this site you are talking about? Is the site already operational and you are just waiting to launch it yet? Or you are asking just hypothetically and you plan on doing gambling site in the future?
I would advise you to check the market first and find a nice niche no one took before. Like e-sport betting for bitcoin or something like that.

I think sig campaigne,and forums give people some small  pro btc and bonus,reffilinks
always the best is when your customers are your marketers,that needs some time but pay the best

From the above list especially "betting speed", seems that you will launch a dice site, am I right?
If so, there is a thread where some members share what they expect from dice site https://bitcointalk.org/index.php?topic=1051431.0
Perhaps you can gain as much as great idea on that thread. And seems that you miss one of the most important things in gambling site "provably fair system".

Good luck on your plan, and wait for the great grand launching

What about the odds? The house edge  and the max profit and all that, what have you in mind more exactly for it because you cant open a >2% house edge casino since there are already casinos that offer way smaller house edge. Honestly about the ui i dont really care that much, look at just-dice shitty ui but one of the most famous dice casinos out there

bitcointalk is the most important place to promote gambling sites, so you should start advertising from here in form of campaign,giveaways,competition etc... you can also buy ad slots on various bitcoin advertising networks like a-ads,bitmedia etc...

Google ads might be a problem. I tried to advertise site in my sig, but they refused the ads and asked me to send them a gambling licence...which I don't have because I'm just a referral. If OP had this licence, Google might approve it, but not in all countries...

If you want to have effective advertising for a Bitcoin gambling site - I'd highly advise that you advertise on the forum itself (theymos sells ad space each and every month) which would reach a large number of users - or you could try the much suggested method of a signature campaign alongside bonuses/promotions for users of your site. The best way to get people playing is through word of mouth - so have an interesting game with a nice UI with promotions that people want to be a part of.

As others have mentioned a few good places to start are the forums, gambling advertisments at faucets, and signature campaigns to attract visitors of course it should be a for a while in that case to establish a good reputation.
A few other ways are promotional events that get people involved like a video contest for your site, faucet for users who bet over a certain amount or some unique game that isn't seen as often on other gambling sites.