Probably the key to eventual clarity is at PJRC's forum. PJRC makes Teensy. Imho it's a great product, and the owner, Paul Stoffregen, a great engineer and person from my experience using their products.
1. SparkFun and Adafruit are in conflict
2. SparkFun manufactures Teensy under license from PJRC
3. SparkFun cuts off Adafruit as a reseller
4. Adafruit can no longer sell Teensy
5. Adafruit posts on PJRC forum announcing an open-source Teensy competitor
6. Paul posts that it's outrageous in terms of etiquette that they're announcing a competitor on his forum. Adafruit's own forum only allows discussion of Adafruit products.
https://forum.pjrc.com/index.php?threads/open-source-teensy-...
My summary:
1. SparkFun and Adafruit are in conflict 2. SparkFun manufactures Teensy under license from PJRC 3. SparkFun cuts off Adafruit as a reseller 4. Adafruit can no longer sell Teensy 5. Adafruit posts on PJRC forum announcing an open-source Teensy competitor 6. Paul posts that it's outrageous in terms of etiquette that they're announcing a competitor on his forum. Adafruit's own forum only allows discussion of Adafruit products.
He's allowing it despite mixed feelings.