My point is that is was on the price list, the sources were never hidden away. And that a lot of people did have access to it. Your point - the prices to get a ticket was too high and thus, when the price was even less, even more had access. Which I did not (and do not) disagree.
But Unix was open, people did discussed it, people did look at it, learned from it etc.... that was not true of "closed systems" like say Cisco's. Our even VMS, although VM, TSS, OS/360 and the like were "Open." That's why we have a UNIX "industry" -- it spread beyond the "ivy league" as you said it. The ideas leaked out, because AT&T made it open - because they had by the 1956 consent decree et al....
That is a clear distinction. And please its not about a wall garden ... because it really was not that hard. I'm not disagreeing that it did not happen and your point is that people were excluded ... I get that. But don't call Unix closed because there was a price (aka a ticket). It just was not "free" -- that's all I'm saying and as you have pointed out that difference was in practice to many, many people large (which I'm not disagreeing).
You and I really need to have the beer together ;-)