(Can someone help me remember about a btc site)
It does not send a message to your e-mail when signing up.
And you invest 0.1 to 0.5 btc minimum.
Thanks in advance.
There are many BTC gambling site in this space and I'm not sure what you mean by investment. 0.1 BTC as a minimum is too much and maybe it was a typo on your side. And secondly, I won't use such gambling site that doesn't send notification during sign ups, I'm sure there won't be notification when someone access your account.