This is the first time I read that requirement for withdrawal should be joining their discord group, it's questionable, very unusual and something new, if they want to increase the members of their discord group, this should not be the way if the one requesting withdrawal has an issue they should have a dedicated site for their support like a subdomain it's unprofessional if they use a third party chat group to address the concern, it's not really a sign that your casino is not good but do it like all the other big casinos, a dedicated domain for support to address all concerns.