Honestly, having a lot of cookies isn’t that bad, like you said, it’s good for the vending machine, and any other limited things that will be releasing.
I agree on your point with the Nemo bucks, I know you can earn a lot by playing the game, but I used a lot of Nemo bucks and egg coins trying to get the last surprise egg that I need for the unlimited egg machine. I’m trying to get what I need quickly to start saving. For the haunted eggs, I only have one egg remaining, and it’s just a frame. Point is, lots of players probably relate to this, and new events keep on costing Nemo bucks, it’s funny comparing the amount of cookies one has compared to Nemo bucks and egg coins. Mystery boxes are just luck to get Nemo bucks and egg coins, yet still pretty useful. I’m fairly new, joined at the start of this year, so I haven’t been able to grind that many Nemo bucks and egg coins. Though I don’t blame anyone but myself, I don’t get all mystery boxes every day.
I believe the developers just want players to do more micro transactions, I don’t blame them, they need a money to continue updating the game.