Well, if it's anything like the theater I used to work at (worst job ever, by the way), then they just give the posters to the employees after they're through with them.
I used to work at Famous PLayers many aeons ago, well 2 years ago actually.
I used to get posters like this all the time, but sometimes the distrobution houses ask for them back.
I had no way to get standees home so they were usually derstroyed.