I was contacted by our friend Museigan

DO NOT VOTE FOR CSGO TEAMS THROUGH FLAST CROWN LINK IT'S A SCAM
This seems to be a new scam cropping up to phish your information. If someone you know sends you that link for flast crown and asks you to vote for their CS:GO team report their profile as potentially compromised. It seems to be done through bots, they don't respond to conversation.

https://www.reddit.com/r/SteamScams/comments/kixqtm/vote_on_my_csgo_team_scams/

The website itself is "Too new" to be verified by the internet as safe or not yet.