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It's 100% open source. Dan left because of the license limitation. That one limitation means he cannot compete with Steemit using Steemit's technology because of threats of violence.

Dan left because of the license limitation.

Dan said why he left in his resignation post thread, and it wasn't that. Dan was the one who chose that specific license for steemd.

PS: The NAP doesn't apply to property, otherwise contracts would be meaningless. :)

I would love to have a friendly debate the nuance of contract law. Since we have 255 depth, I'm game. I would use the @marcstevens criteria for discovering if there's a violation of individual rights. It starts with finding a forum with jurisdiction to enforce its ruling.

Sadly, I cannot discuss the details of this particular matter, though I look forward to discussing such things with you in other contexts here on steemit one day. :)

All of the code that steemit produces is 100% open source. There is a little bit of debate around whether or not this particular open source license qualifies as "free software". I think it does, because it is relatively permissive. Some disagree. It's a minor point, because the only restriction on it is that it must be used on this blockchain.

Dan was the one who chose the license in use by steemd. In his resignation post thread he explained why he left, and it wasn't the license.