Why do you advertise unlimited extensions, but with hosted you specify a maximum number of extensions?
You may create unlimited extensions for any 3CX subscription. The limitations mentioned regarding hosting are due to the limitations of your hosted instance (vCPU, RAM, Storage, Voicemail hours and recording hours), not the 3CX license itself.
These recommendations are based on the average usage of the specified number of users of a phone system. We do not recommend creating additional users for your PBX according to this table.