Would it be feasible for a competitor to use Ebay's network effects? If users gave an Ebay-killer their Ebay passwords, their feedback could be imported, helpi

Would it be feasible for a competitor to use Ebay's network effects? If users gave an Ebay-killer their Ebay passwords, their feedback could be imported, helping to get the initial activation energy. A superior auction/marketplace meta-search application could also help kill Ebay. If people preferred to use it, buyers would see auctions at competitors' sites, not just Ebay. Creating a meta-search site might be a good first step for an Ebay-killer.