Why is it important I install Group Gator from the Google Apps Marketplace and not the Add-on store?

Installing from the Google Apps Marketplace is critical because it allows for Group Gator to obtain the ability for non-admin, delegated managers to “borrow” the necessary authority to manage groups they are not the owners of.  Purely installing Group Gator from the Add-on store will not grant the adequate permissions.  End-users (e.g. delegated group managers) should be the only ones accessing Group Gator from the Add-on store.