The Perpetua drop was delayed for months. First delay was the Nitro-V was delayed in shipment, understandable. But then more delays, with no good explanation as to why (one of them is probably due to Millit deciding that instead of sending the blades out for lasering like originally intended, they bought a lasering machine to use in house which took time to set up and figure out). When the knives finally did make it out, some people felt the QC was lacking. Some were tightened down so that you had to put a bunch of wrist into it to get it to move like a Benchmade axis-lock (which may or may not have been by design, it is supposed to be a user knife). Mine came with a discoloration spot on the blade out of the box, and I've seen at least one other picture of the same thing (disconcerting because Nitro-V is supposed to be super stain resistant). On top of that the clip was pretty bad. Millit developed a fix that they showed off on their Instagram, a titanium pocket clip. Not for sale because they needed clearance from Massdrop to sell them. Since then they haven't showed up for sale by Millit (that I've seen) and they haven't show up for sale here on the site either (granted that could be because Massdrop doesn't want to look bad by having to sell you a fix).
This is all speculation. I'd like to point out that Massdrop has had a few other drops featuring Millit as the OEM. After my original comment I found out that they did a run of the Serge Coinclaws (made by Millit!), so maybe it's not quite as farfetched as I thought. I'd still be very surprised to see an Orbit drop though.