Its called no deposit because there is no necessity of the first account replenishment, you get your bonus just for the registration. Speaking about a no deposit bonus, this one is usually given in a form of some free spins or extra money. There is a wide range of them and all are increasing your winning chances. But there is one more thing all the gamblers are striving to get. There are many things players like in online gambling: the spirit of the game, real true-to-life feelings, and, of course, an opportunity to win.
