Live streaming has become a massive industry in the last several years, with successful streamers able to make a sizable profit.
This harsh standing on Twitch seems a little overblown, but there is a precedent for this sort of quick ban for lewd content, intentional or not.
Others hinted that it seemed like this was a common occurance, or even something Alinity actively encouraged.
Definitely seems like some unfair things going on with Twitch regarding bans from one person to the next.
This suggests that something has gone wrong for Amouranth across all three of those media feeds, leaving YouTube as her only way to produce new content and explain the situation.
In Amouranth's cases, it seems likely that Twitch will only rule on a temporary ban for her account, letting her come back to the platform soon.