There is Open Core Licensing, as canonically defined by Lampitt, and there are the Open Core Business Models it supports. Whether adding blobs and bait to Linux makes business sense is not the issue: the blobs are non-Free Software, the bait is harmful, and misrepresenting Linux and distros that include the blobs as Free (or Open Source), or as advantageous as, is bait-and-switch (Phipps' term) and deception (Oliver's word).