Using Samsung Apps (their store) with CM11
As some are aware, Samsung Apps forces its update (otherwise it closes), but under CM11, the update fails because Samsung Apps requires Touchwiz and CM11 doesn't provide Touchwiz. I needed Samsung Apps for one app only which needed updates from time to time (Garmin/Navigon GPS for Australia, which used to be on Play Store, until Samsung or Garmin saw some reason for moving it to Samsung Apps).
I've found a way to consistently open Samsung Apps and defeat its update, so that I can update the navigation app.
(1) Start Samsung Apps.
(2) Immediate touch and hold the Menu button (ie, left of Home button). This starts Google Now or Google Search.
(3) Back out of Google using the Back button (ie, right of Home button). This seems to take two "back"s, but that might be the way my phone is organised.
This gives you Samsung Apps, no update, and ready to login.
[I'm using the hacked Samsung Apps from the first message in this thread by Toastido, which is Samsung Apps with the Touchwiz bits deleted].