Selling coupons, buying loyalty
Some months ago I was talking to a friend who told me that when he used to work booths (he’s quite a freedom activist), he would sometimes sell brochures and handouts instead of giving them for free. People passing by could read them there free or charge, but if they wanted to take it home, they would have to pay. It would be a small fee, like 25 cents or some other small amount. But the idea here was not to make a profit, but to create interest.