I am willing to take full blame for this confusion - I didn't know how else to coin these systems.
MyWebGrocer, ShopLocal and one other that escapes me at the moment, are companies that provide Circular (weekly specials that are sent to homes either as inserts with-in newspapers or in special ad bundles) information on the web. From what I can tell there are some exclusivity in between grocery chains and the company that provides online Circular information.
OK, that was my guess though they aren't called that here in AU.
Wonder if the companies cover costs for the chains in exchange for info that they can use in other ways?
Grocery specials and inserts in Australia are nearly always by the stores themselves rather than aggregated. We don't really have grocery coupons either.