I'm not the person you asked, but as real tibia veteran (7.6-9.x + many hours on 12.x) I just find it worthless to play rl map OT server unless it's heavily customized like the example (Medivia) you provided. Reasons why:
- my ot account will last only until end of "edition" while rl tibia acc will last years if logged in once every few months
- real map servers are just a cheap copy. No thrill (at least I don't feel it), running into missing features that are expected to work, incomplete npc dialogues, lower quality scripts noticeable when doing quests.
Now when you enter a custom server with relatively familiar map and usually similar tp layout, it's always a new experience. Different owner, different quests, different events. Even if npc dialogues are completely empty, they provide a completely new experience. You're pretty much playing a new game with each server like that. You run over new places. There is a thrill of exploration, of doing new quests, of getting killed by pkers in random places (unlike rl tibia where they camp in meta spots like kazo passage). Which is something that can't be said about 10000th low effort rl map server built from otservbr-global datapack. To be clear: I don't insult the datapack because they're doing a great job, but if 6 servers are identical, then what is the point of playing the other 5?
Why too-custom servers are less popular? First because no bot-waypoints exist for them, second because it's not the karmia/evo/yur base and they struggle with figuring out where base npcs or hunting spots are.