First off, unlike other positions on Broadway, ushers aren't hired or have anything to do with production staff of a given show. We are employed by who owns the house. You work at the Majestic, you're an employee of The Shubert Organization. That's the name that's on the check. You work at The Minskoff, you're an employee of Nederlander. So, I don't see how this comes into play with what St. Martin is talking about in that article. And, Fosse, for whatever it's worth, we aren't paid that well. We do more than just seat people.
And, kkeller6, regarding what you said about "asks" during the load in/load out process, no one would do any of the things you mentioned. For one thing, non union members doing any work on Broadway, for whatever reason is just not something that happens. Hell, you can't (and this is true) have a lightbulb changed in the men's room of a theatre without a union electrician doing it. A few work buddies of mine are crew. And, yes, while it is true that you would need more stagehands working for load in/load out than during the actual show, they don't bring in non union members for help. What does happen is that union crew members who are working on other shows, will help with load in/load out during the day, then at night work their shift at their respective theaters.