@Colum31#137912 These scams are quite common. Skin giveaway and fake gambling sites. They are used to steal login info for your Steam account. And then they start spamming everyone in your friends list about the site.
@Colum31#137914 The website is hosted in RU. Which in my experence, has a 99% chance of them throwing out the abuse report. But you might be able to get the owner and bot’s steam accounts associated with the scam banned. Try reporting the owner of the Steam group and bot account to https://forums.steamrep.com/. In my experience, scam accounts get community banned shortly after being reported there.