It's not the problem of upload space on the server, it's the download time on the receiver and the bandwidth of the server. vBulletin just doesn't allow remotely hosted avatars by default. I don't know for sure, but I think the reason was because of image failure checking, or image size / dimensions checking, that could only be done on the server side rather than an off-site server.
Yeah, it could be anything
Alcar...