It does encourage more participation, but also encourages rushed participation to get tickets faster. Those who spent more time and effort into their entries will lose out, even if they win first place. It's sad to think someone who wins first place won't even be able to buy a feather. Or second place, or third place. Again, I have a strong hunch that with this in mind, they will have a restock. They've done it in the past, and all I can do is cross my fingers for those who are still awaiting results/tickets.
I assume that's their reasoning for the low stock as well. Though I personally don't agree with it, and you know how I love me some rare collectibles haha. (Even though I'm selling mine for pokeheroes stuff xD)
Hopefully they'll increase stock and most, if not all, people get what they worked hard for, even if it would be to resell them.
Another idea I just had is to have a limited stock for tradable collectibles, but an unlimited supply for those that wouldn't be tradeable. That way those who saved up for a feather would be guaranteed their feather, given they obtained enough tickets. I feel like that could be a compromise most people could get behind.