In our early years traveling with RS, we received two of everything in the pre-tour kit. I heard a lot of comments from fellow travelers that receiving two books per couple was wasteful and I'm assuming that influenced the decision to send just one guidebook. Because I cut one book up and spiral bind the parts I want to take with me (tearing the pages out as I go), I like to have a whole one at home. When they switched over to sending one book per household, I said that we each would like a copy of the guidebook and they've always sent them to me. I don't look at these items as "freebies" as we are each paying for the tours.
Now, regarding the money belts - We each wear a money belt and I can't imagine being comfortable with just one of us carrying both passports and the other contents. Years ago, we were on a ferry from Capri to Salerno. As we were pulling out from a stop (Positano, maybe?), a woman started yelling that her husband had gotten off the ferry, but that she had missed the stop while she was sick in the bathroom. Great husband, I know. But, the thing that has stuck in my mind was that he had all their money, credit cards and I.D. The ferry certainly wasn't going to turn around, so she was headed to the next stop empty handed and without her husband. This was before we all had cell phones in our pockets, so I hate to think of the hassle she faced. Without access to money and I.D., I'm sure it was much worse.