If the account is indeed a bot spamming advertising then Twitch usually actions the report within 2 minutes (this is based on my observations of when I was reporting hundreds of accounts per day and tracking their response time and handling of the bots).
Yeah, those supposed bot lists that people post on Reddit, or some devs use in their tools, are known to have significant numbers of false positives and the people who create those lists often do nothing to actually reduce those wrongly on the list. So I would discourage anyone reading this thread from using such lists.
For simply banning individual users across multiple channels, rather than bots, I’d suggest having some sort of text input field where a user of your app can specify the channel they’d like to use this app on, many broadcasters would not want such tools being used by their mods so it may be best to let the user configure what channels exactly they wish to ban on.