Since these towel dispensers are all over schools and other locations that likely get more traffic than that museum, either they are buying the good models which everyone in the business knows about, or they are choosing to buy the cheap ones because it is a better value despite having to replace them all the time. I don't buy such things so I'm not able to tell you which. I know that there are enough of them in the world that anything not robust would be well known quickly. (there is a possibility they bought something new that turned out bad, but then replace it once and done)