I wasn't referring to the achievement, only to the number of collectibles dropped I think is related to the available space - at least that's the only thing I can think of. As far as the achievement, I completely agree the formula should have been skewed up a little so that anyone that works to get the collectibles should be able to make the achievement. I would have made sure the pumpkins would have been enough that if you collected a total of 40 drops (2 times a day for 20 days as an example) that would be enough to do it.