Counter-Strike: TheMongolz vs Vitality (BO3) - BLAST Open Rotterdam Group B is a active prediction market event on Polymarket with 12 markets, $2.1M total volume, and $2.2M in liquidity. Key markets: Counter-Strike: TheMongolz vs Vitality (BO3) - BLAST Open Rotterdam Group B; Counter-Strike: TheMongolz vs Vitality - Map 1 Winner; Counter-Strike: TheMongolz vs Vitality - Map 2 Winner.