Over the years, I've been inundated with mailings and catalogs of all kinds. In most cases, it's because I had ordered something once from one company and then I guess my name is added to the various lists that get sold. I've tried to get myself off using a website that purported to notify the sender to remove my name. It didn't work. When I moved three years ago, I thought it would all come to an end, but the post office told me "they'll find you." And they did.
With GCT, I have managed to stop the mailing of OAT brochures as I never travel with them. It simply took one statement, almost in passing, at the GCT office in Boston. And the right person overheard me and said she could take care of it.
So now, I only seem to get things I've shown an interest in by checking off on surveys. Except for the extremely LARGE catalog that came the other day on Small Ship Cruises. I had a lot of trouble getting it out of my mailbox. Interesting to read, though, before it went into recycling.
And I do sometimes get them from other travel companies. I read them only to make a comparison with GCT, and GCT always comes out ahead.
I agree that it seems to be counter-productive to use up all that paper when we can get the same information online. When I worked managing a library for a business and got multiple copies of the same announcements at work and at home, the publishers told me that it would be too expensive to re-program their computers to get rid of the extras.