The fees are the fundamental attraction of this bookmaker, as well as its absolute privacy and security. They do not request any personal data, since you only have to indicate a username and password. Simply create a Bitcoin address from the website to deposit this virtual currency and start playing.
They do not have a welcome promotion, but the bonuses are very interesting. They have various promotions with parlays and even a competition called Parlay Jackpot in which users can win succulent prizes.
Also, Nitrogen Sports has temporary promotions that have to do with events that are being developed at that moment or soon to be held. Currently, for example, it has special promotions related to the 2016 World Series of Poker, with the Oscars and with the elections for the presidency of the United States.
In summary, good rates, good promotions and absolute privacy and security.