Forum Moderators: martinibuster
A number of my clients are using the Yahoo Store system, and in each case they typically have a few forms of URLs that we notice in the SERPs...
ystorename.com
store.yahoo.com/ystorename
...are both actively in use. In the past, other subdomains had been used (like shop.yahoo.com/ystorename) but most of these other forms now forward to the Yahoo Shopping Search Center.
So, if anything, you may get credit for double-link pop if Google hasn't caught on yet that the sites are the same on both URLs. For what it may be worth, I've had one client using both forms of URLs in the engines -- and both formats have been there for well over three years now.
Good luck.