Twitch needs to investigate the games that their affiliate requests are playing before handing out Affiliates. There are people who stream private servers who are getting affiliate status when they are in fact breaking Twitch rules!

It is written in Twitch's community guidelines that "Unauthorized Content Sharing & Other Copyright Violations
Uploading any content that you do not own, do not have the rights to, or are otherwise not authorized to use, violates our Terms of Service and may make your account liable to DMCA takedowns by third-party rights holders. We do not tolerate, for example: rebroadcasting other Twitch broadcasters’ content, playing pirated games, showing third-party movies and television shows, rebroadcasting a sports match, playing on UNAUTHORIZED PRIVATE SERVERS, or uploading content from other sites without permission of the copyright owner."

Do not let Private server streamers get affiliate status.