I’ve received reports from multiple people and witnessed first-hand that group stores are now showing thousands of pages of Catalog items that were not originally uploaded by the group owner.
This is visible in the Unofficial DevForum Group store. https://www.roblox.com/groups/3514227/Roblox-DevForum-Community#!/store
As you can see it is quite obvious that these are not intended to be there. As far as I’m aware this is happening to most, if not all groups on the platform.