How did the snack shack change during Greg's kindergarten year, and what problems did that cause in the Diary of a Wimpy Kid: Big Shot?

In Greg's kindergarten year, the snack shack was not any fun. The parents complained about all the junk food sold there, and they replaced the slushies and sugary treats with healthy options. The slushie sales from the snack shack paid for the field upkeep. So the parks department could only afford to mow the grass once every three weeks. That made it difficult to play on the field with the grass so long.