The secret lives of compers

I won: a case of wine, a garden hose, tickets to a play, tickets to a concert, tickets to a book festival event (from the Guardian, in fact).

Depending on your jurisdiction, you may not have to buy anything for a chance to win: https://gleam.io/guides/no-purchase-necessary

I am not a comper as described in the article, but during the pandemic I've saved a lot of money on all sorts of household items/toiletries by using up the travel-size freebies I'd amassed over the years.

Here in the US you don't really see these kinds of promotions much. By law (in most/all states?) you're not required to make a purchase to enter any corporate prize drawing. So I wonder if businesses mainly don't bother then?