Free bonus is nonsense,the op just want attrach more people to visit this site
There is a chat lotto available in the chat of bit-exo. It must be funded though, this can be done by the players. But almost every day the admins of bit-exo will send some to it. And when active in chat, you can be the lucky guy to win some.
But as far as I know, there is no such thing as a bonus on bit-exo.
Beside of chat lotto, which is small amount, sometimes they give some bonus too when their admin around. So you can get both prize if you are lucky enough. They even give bonus a couple of times in a day. They really give some though but what i saw that is only some little amount which is not really attractive compare to other sites