I get it to a point. I know people that don’t hunt but belong to DU and buy a duck stamp for the conservation part of it. I’ve never seen one that had a ‘hunting’ theme, just artwork of ducks.
https://survivalmagazine.org/conser...re-no-longer-required-for-duck-stamp-artwork/
https://survivalmagazine.org/conser...re-no-longer-required-for-duck-stamp-artwork/