Just because it is FREE
It is a common reaction ...
Ah yes. The old "if its free I must
have it, even though I already have 10 similar items which I already don't use"
I know I've said this before, but I used to work for a big pharma company, and had a friend who worked in the marketing dept. Periodically, they would clean out their "stash" of freebies they gave to doctors, pens, pads, and other doodads with various drug advertising on it. She once told me it was like a feeding frenzy whenever anything new was added, and that she was convinced if you gave away poo in a bag, as long as it was free, people would take it.