Hm. Seems like these Russkies are using some kind of "secret sauce" crawler/parser? And it does check "in stock" info on-the-fly? Plus stores are not even invol

Hm. Seems like these Russkies are using some kind of "secret sauce" crawler/parser? And it does check "in stock" info on-the-fly? Plus stores are not even involved in the process of aggregating the inventory?