I think you're asking about this portion of what I wrote:So they don't have a maximum number of people allowed in the queue?
So to clarify, they will stop taking walk-ups when their experience tells them that taking more walk-ups would tend to boost the wait-for-table time for folks with ADRs too much. Remember, these folks can look at what's happening, both in the restaurant (where things like how long some parties decide to linger may affect load) and at check-in (such as if there is an unusually low or high number of no-shows so far that day) and respond to those things accordingly.WDW restaurants don't take reservations, and so they don't hold tables for no-shows. They have daily experience with how many people tend to no-show, and fill tables with walk-ups based on their experience.
The only hard-and-fast maximum is the maximum occupancy of the dining room. Everything else "depends" on what's actually happening.

