Well I don't think there would be any problem with that right? The whole point of the preorder is to fulfill all the demand, even demand from people who only buy from retail brick and mortar and other big online retailers.
I think everyone who wants preorders to continue should be clamoring for retailers to order lots of copies, because the more copies this preorder sells, the more likely this practice will continue. For instance if the likes of Gamestop decided to order like 50k copies through this preorder, that would be an amazing successful for this run and would likely ensure that we see preorders for lots of future releases no?