I know the quest is really only there so we know how many collectibles there are on the island. Still, the part where I click "claim rewards" and there's a big fat nothing to claim is disheartening. Why should I spend half an hour just to find one more scarecrow?
I'm not expecting any large rewards, just something that gives one the feeling of having accomplished something. For example, how about something like getting an automatic buff* on the mayor's house which would last until the next set of collectibles appear, and would allow for making buffs out of collectibles at a lower cost. (i.e. each buff would need 1 fewer of each collectible to make, or a random collectible (i.e. food carts) cost in each buff would be halved, etc.)
-----------------------------------------------------------------------------------------
*not the kind of buff that would prevent buffing the mayor's house with population increasing buffs because it already has a buff on it