I only use it and have thought about expanding it for sites that we own and/or operate. Not putting others under there.
I agree with what everyone is saying. The whole "endorsement" thing being an issue. But I totally find the idea of keeping it and allowing you the user to customize it to be totally stupid. Signatures are enough and if you think you need more, then you're nothing then a sig whore. Now maybe allowing it to be customized to the manner that the end user could choose what is listed under there and/or uses their referral code for your sponsor or something, that's a different story because that's still giving everyone what they're wanting.
Just my two cents..
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