winter pike
Currently, when a player purchases the Inventory Space for 300 gems in the "Grocery Store" section, they can just keep buying as many as they want, even if they've maxed out their inventory space limit, wasting gems/money.
A simple limiter on how many of these can be purchased would be helpful. Likely for the chest storage as well.
prime girder
Good idea though you also have to take in effect that events have dropped inventory spaces too, meaning your store would have to take steps to sync with any external way to obtain those items. I can imagine it to be a bit of a pain to code but will probably be a QoL update eventually.