Because they’re trying keep it simple and make the most margins. ZoS treats game as a Buisness as it is. If they can get away rehashing models and content and tossing majority of mounts and styles into crown store they will. Only way it stops if players stopped playing or buying stuff. Look at that silly marvel game that died. Monotization and lack content murdered it. ZoS will push yearly content stuff to keep players engaged while routing most of fluff to crownstore and not in game. I bet if we did comparison of how many ingame mounts vs crown store we would see crown store see’s 80-90%I wonder why they are so slow to add to base things..like hairstyles, new weapons, being able to change your hair colour without spending 1000 crowns, character model updates,..we have been using the same things for years..
Only things that get added are dlc and crown store items.