Xenforo is one of the safest forum platforms out there. I couldn't even tell you what big soccer uses but I picked Xenforo because of that reason and that reason alone. I would love to have a lot of the features and addons that vbulletin has but like I said. Picked it for safety. And the skin is free and I picked it for the colors. I'm sure hundreds of forums use this skin as well but with a different banner/logo.