Music Store Strong-Arming?

Ever notice how bands seem to always hype their new album on one music store and not even mention other places to get it? I’ve heard that bands “have to” in order to get better placement in the store, but never directly from a band member or an official rep. If you have direct knowledge of either direct or implied strong-arming like this, use the contact tab to email or call. Anonymity is guaranteed if you so desire.