[r3bl]

I would say that the Betteridge's law of headlines has been proven once again by this thread, but this is no article and the headline here seems more click-baity than the actual subject line of the thread.

[livingparadox]

The answer to your parent comment's question is "no", but their question was the inverse of the post's title.

So, this actually is an exception to Betteridge's law; the answer to the question is "yes, arduino is no longer open source".