@DrPiccoloPhD I do believe that the Reward-O-Tron was intended to be a set number of capsules with no future restock.
I came to this conclusion because Rux is now selling content in his store for Rainbow Stars which is identical in nature to the content within the Reward-O-Tron capsules.
It’s also clear that they need costume pieces, accessories, and themed text, emojis and so on to populate the next 8 Festivals until they can repeat Lawn of Doom so that’s a fair bit of content held back in addition to the stuff showing exclusively at Rux’s shop.
We also have had several players who managed to empty their Reward-O-Tron very early in the games lifespan (I’m still working on mine) and since then we’ve had at least two new festivals roll through Neighborville which would have been a good opportunity to trickle out new content to be bought there with coins but it has remained empty. So considering that a player investing an hour or two a day in the game, which we can assume to be average, will take months to empty it I fully expect that they stocked it with a specific number of capsules to ride out a specific amount of time without being concerned at the outlying small percentage of players who would grind the game obsessively enough to empty the machine in the first month or two.