One day I noticed that the bag of mixed nuts I just bought was labelled 50g less than a bag I had purchased a few months ago. It wasn't the case that there were less nuts in the bag. The bag itself was smaller so as to maintain the appearance of robustness.
What struck me is that this probably wasn't in response to any sort of supply or demand shock, but was probably already planned since the product was first introduced. The way the design on the package was already reconfigured and then the package distributed to factories to be filled with the new amount, the producers knew and planned beforehand that it would happen, number crunched and everything.
So now I already internally think to myself that any consumable product that screams great value will inevitably fall victim to skimpflation, because it was planned from the start. Make an awesome product, get people hooked on it, and then slowly ratchet back the value to reap the gains. And of course hope people don't notice.