I'd imagine eBay will do whatever they can to try and make an edge that retains vendors/buyers. That is to say as long as they can regulate it.
I mentioned this in another thread where they are filtering various things such as javascript etc. They need be careful as the technologies evolves and they disallow vendors to use the browsers abilities to maximum potential they leave the doors open for others. For others? Yes... Not necessarily eBay site competitors but other enterprize vendors. Retailers will do what they can to maximize the web prospects. If eBay disallows vendors to "be state of the art" then the true "state of the art" sites will attain the buyers.
eBay is apparently so large its near impossible to reach the powers that be to communicate. I have ideas how half.com could be extrordinarily successful, reborn in fact. eBays main site has so many vendors that from what I have read more and more of them are having a hard time competing for sales. Them selling items so cheap its near not worth doing. There are numerous ways things could be better but again... cant seem to get up the ladder to speak to anyone. All I keep hearing is use the suggestion box email. I am not about to waste numerous (numerous) hours of my time on a email suggestion box that more than likely will not be viewed by any party who understands what I am proposing/saying. So................