The results are the same if you direct open or spin. Spinning is simply a direct open with an animation designed to make you think you had a better chance at something than you actually did.
Always direct open, spinning is going to give you blue balls, it doesn't matter which you pick, but spinning lets you look at the heros you want only to not end up getting them. I would rather get an old black panther quickly, then watch an iceman or ghost rider roll onto old black panther
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The results are the same if you direct open or spin. Spinning is simply a direct open with an animation designed to make you think you had a better chance at something than you actually did.