Just my opinion, but it would not be a stretch to say it now makes sense to eliminate the signing up of someone as a guest at the desk. Now that there is a way to attend as public without joining, it is unnecessary. (edit: To clarify, I know the difference of dealer halls only for public vs. all halls for guests. My point is that either is the "taste" of York to get someone interested, and hopefully have them consider membership.)
It makes perfect sense to leave it available as an option for people who are actually friends of members for a one time guest admission, as has always been possible.
I realize the organization and meet have evolved since then, but back when I walked up to the registration desk in the Blue Hall (before it moved to Silver) not fully informed for the first time, I was unaware of the signatures required for membership. I mentioned to the registration folks the name of my hobby dealer (whom I had known since I was a kid) and the solution was to have a guard escort me to his table and have he and another member of his staff who knew me sign my application so I could then return to the registration desk and join. (edit: I am well aware the two signature rule is no longer in effect, I am not trying to suggest it should return. While we are at it, the initiation fee that used to exist has also been waived for quite a while now.)
I happily joined, and I was (as most are) in awe of what I was able to see on that single Saturday. I've been back in some capacity every meet since.
(I am not claiming we should go back in time, so no need to bring up the "it must evolve or disappear" replies).
I'd have to agree the public's level of attendance on a Thursday would likely be minimal. Even for people who do have flexibility in their ability to take a few vacation days, many can't justify doing that instead of using their days for actual family vacations/events/commitments.
-Dave