It should be assumed that all custodial mixers are scams and can steal your money at any point. They know most people aren’t bothering to verify their letter of guarantee and selectively scam their users. Usually this won’t cause them any reputational damage because any proof that might have existed is now gone and there will be plenty of shills hoping to get into their altcointalks campaign coming to their defense, however, Cryptomixer has had some stability problems lately and this all could be an indication they are exit scamming.