I also got it, and theres is a invoice link that we must to click on it, but 40 minutes after that 0.25 btc arrived there is another email from vitalbet that said " Dear Members, Please note that due to an isolated virus infection on a connected computer, you may have received an email with a link. DO NOT CLICK ON THE LINK as it contains a virus. Our development team is working on resolving the issue. Thank you and have a great week!"
I play on it, even not in regular basis and there was no such a promotion or bonus like that...