Even knowing that registration is closed is enough proof that they're a fan and active watcher of Fishtank. And that's fine, a lot of people watch Fishtank and then criticize it here but it's a certain type of poster who posts about hating Sam Hyde in a very specific tone, while also continuing to support him through Gumroad and Fishtank.
"Sam Hyde is a child rapist and hasn't made anything funny in a decade and all of his fans are incels. Fishtank is the lowest form of content and a complete failure of a production. Anyway, can't wait to renew my season pass!"