The problem with trying to back up an argument with those rules is that those rules call for everyone to be IC in public chats as much as possible. While they were brought up because they mention RL occurrences, they also say that lengthy discussions on game mechanics are expected to take themselves elsewhere, and this almost never happens either.
The fact of the matter is, Marketplace is considered by almost everyone I know to be a mostly OOC chat simply because it is used so often for talk about quests, or leveling, or game mechanics - things that are, to most, all completely OOC topics. Where that seems to clash with Awdz is that, to those I know, there really aren't any "levels" to OOC - once we're there, we're there. Talking about how my quest isn't working is exactly the same amount of OOC to me as talking about how my RL workday went.
Another issue is that Marketplace is the consistently most densely populated channel and thus draws the majority of new player questions, some of which are hard to answer without offending Awdz or any that may be like her. What is a new player to do with those questions? Simply not ask them? Are they expected to send a /tell at random to a high-level player?
And what about the rest of the OOC that goes on in Marketplace? Will those talking about game mechanics be asked to take it elsewhere too, or will you be satisfied, Awdz, with merely the lack of RL references and thus only half upholding the server rules that you quoted?
In my opinion, if you're going to bring up the rules, you have to take it all the way. You cannot just pick and choose what rules you will and will not abide by (and what rules you will not stand to see others break).