Some keep such information confidential and so will not display to the whole world but if you try to inquire from them privately and you're fortunate they can fill you in else try to do some social engineering of their staff and see if they can leak such information to you.

Most of the site's now shows how much they won or how much they are in profit. So what you have to do is just go on that site and see site's profit. Case solved.

Yes i think only steam that only accept bitcoin but i hear only in some countries, it's mean not all from us can use bitcoin for buy their games if im not wrong for who live in russian can't use bitcoin for buying games at steam.

Yes of course there were many sites like directbet.eu is now accepting btc as payment and it's so fun to play and has lucky profit chances. Those sites accepting btc payments really helped a lot of people who wantes to play gambling even with small amounts to bet in a digital values, anyway it was exchanged automatically from wallet fiat to btc transaction if you have deposits.

Most of the site's now shows how much they won or how much they are in profit. So what you have to do is just go on that site and see site's profit. Case solved.

The financial system for bitcoin are:
Decentralization; because of this nature or characteristic no single country or individual can control bitcoin it has live of it own.
Low fees; because of high fee charge by western union money transfer and moneygram etc. Bitcoin financial system come to resolve this by offer low fees on transactions.

Yes, I am also not finding any threats from bitcoin to individual people's economy as well as for a nation's. Bitcoin is just a payment system like what the had in the past like Liberty reserve or currently what we are using like Paypal. Additional to these payment systems, bitcoin has some unique features that does not mean bitcoin will disturb financial system of the country nor an individual person.

People are finding financial freedom by saving bitcoin. I believe this benefit from bitcoin will be available for every person for at least next hundred years. So, there will be no meaning of suspecting about bitcoin's potential and features.

GreenBits wallet? It's all the same anyway, the higher fees you pay, the faster your transaction will get confirmed, as simple as that.