Appreciate the transparency! The one thing that doesn't quite add up for me is SparkFun accusing you of "involving a SparkFun customer" in the dispute. Can you comment on what that might be referring to?
This needs a response, and my opinion will certainly be up in the air until I hear an explanation (or lack thereof) from AdaFruit.
probably mentioning on PJRC's forum they're making their own teensy compatible because sparkfun(Under contract by PJRC as the exclusive teensy manufacturer) cut them off.
https://forum.pjrc.com/index.php?threads/open-source-teensy-...