I actually watched that stream after reading your post, just to verify what information was presented. I think you might have misheard Bruce at 16:10, in which he states that you will get the Enzyme Missile Rack if you're in the top 10%, unless the NMOM manages to beat Epislon. And as there with 6 hours still currently left, this would be very surprising. However, if this did happen, the top 75% would get the enzyme rack. But yeah, this is what Bruce was stating. He explained the differences in combat bonds at present 5.4:1, and then goes on to state that the top 10% will get the Enzyme rack. This is good news my friends!
The whole tier 1 prerequisite appears to have been a minor oversight, or was simply not removed from the default template as to create a slightly more pressing sense of urgency for the other wise. The default template for issuing these CGs for these dual engineered modules may happen to have that the text "if tier 1 is reached", but this text doesn't necessarily apply to each event (its probably just annoying to alter the text, and well, programmers are lazy. This comes from personal experience. Things break in unexpected ways, you gotta fix them, etc etc.)
The miscommunication, if indeed it is one, is likely due to the monopoly of attention the Alpha is demanding at the moment. As the whole point of this CG was likely to get some of the people playing the Alpha to go back to the base game for a little while, in order to reduce overall stress on the server, it seems irrational that FDEV would punish players for taking the bait. The whole point of throwing a bone to the other side was the encourage competition and a lively PVP event to draw people back to the main game, it doesn't make any sense to take the bone away at the end!
Honestly, I can empathize with the situation if this is indeed what happened. And I'll be quite relieved when that sweet, but probably also mediocre, reward shows up. Man, I was playing this event in open, do you have any idea how many wings of 3-4 for I had to solo during this thing? It was nuts lol. I also fired my NPC pilot I had leveled up from novice, just to get more bonds for this thing. I better get that stupid rack.