But on the other hand; the email doesn’t look quite right, with the AllTheAnime image slightly different (squashed, and not usually used in a ‘header’), and having no promotion of any of their own products.
The offer seems to be limited to just the Mystery Box people, which is something scammers wouldn't easily know nor would it be worth going after that one subset of people. I imagine there is no promotion and poorly put-together visual because it's an extra and not something being used widely.