Don't think people didn't enter because they didn't want to.
In my own case I listen to podcasts whilst doing other things, and only listen to them as background noise unless there's a topic that's important to me personally. To go through the whole podcast again with a pen and paper and listen attentively doesn't fit into my schedule, even if the prize is not bad.
i.e. The return(gold pass) to reward(time sink) ratio is wonky, and I feel you'd be better off looking at competition types that take less than 5 minutes to enter.
SEAK on the Bartle Test
You are stood on a narrow road between The Land and whence you came. - MUD1