It is the right decision, but not a good read. If the SIA development team thinks it can arbitrarily make certain demands of a powerful competitor, it's not going to work out that way.
Few quick points:
1. "Bitmain is evil because the announcement was made when Team America was sleeping." Welp, guess what? They live in another time zone, do the math.
2. "Bitmain is evil because they hold patents." Anyone care to guess how many patents Apple holds? Microsoft, Oracle, IBM, HP, Dell... Buford? Buford? Anyone?
3. "Bitmain should have come to us 60+ days in advance and revealed their business intentions" If you ever get to the level where you are competing with Bezos over cloud storage, good luck with this fantasy.
4. "Bitmain should have revealed to us in real time how many units they intended to build, how many they had sold, etc., etc." See above response.
5. "Bitmain is evil because they did not call the A3 a "SIA" miner." This tells me all I need to know about the mindset of certain people. Hmm. Let's think about this one. Let me put on my lawyer hat for a moment.
If I, as Bitmain, correctly anticipate that Team SIA might pull some stunt like a hard fork, which would render my miner unable to mine SIA, what is my legal team going to tell me? "Whatever else you do, don't call it a SIA miner, because the moment it can't mine SIA, you are going to get sued." Call it instead a Blake2b miner, because if anyone complains in the future, your response is: I sold you a Blake2b miner, and a Blake2b miner is what you got. Anticipation of this sort denotes intelligence, and I am sure Team SIA reads this the same way I do.
And finally this: If I wanted to do battle with a powerful competitor, what possible reason would I have to spell out my battle plan in public 10+ months in advance? I can think of only one reason. SIA was smart enough to realize what might happen, therefore they didn't fully fund the project. They let their customers fund the project because hey, if their fears turn out to be correct and Bitmain scoops them, it is not their money on the line.
No sane business person announces to the world in advance, "Hey, I plan to buy a controlling number of shares in Company X 10 months from now." Why not you ask? Because if the rest of the world takes you at your word they will front run the crap out of you.
I've poured over the Reddit postings and it disgusts me. 50% of it is just incredibly juvenile, and 50% is the most cynical, dissembling BS I have read in many a month.