Thanks for this report, Danita. Actually, I am surprised by this but my memory is bad: I never had it setup to give acorns. The feature was never a feature that automatically gives acorns. That explains why it's not listed in the Acorns help feature linked in our footer.
Well, I went ahead and added it today so starting now, any future image posted to that area will grant 1 acorn as a reward. This will not be retroactive to the previously posted images, though.