Hi slavadp1,
This email is not from Bitsler it's just a scam.
We will never ask you for your BTC address, when we are running some promotions, all the prizes are sent on the players accounts on Bitsler.
We are not spaming our players emails, we only use them to answer to the players support tickets. We are thinking about a news letter in the future but it's only a project. Please ignore any other email you can get. If you have any doubts, feel free to contact our support.
Regards,
Gabriel