Nowadays, few people will start custom server even if they do, they wont stay for long. Today's Tibia is much different back when as you call "old generation" was used to. Most of the people who actually play the game, they dont do it manually, of course there is small amount of people that enjoy some exploration but they will get bored quite easily as it is not fun to explore empty map(small amout of people). That's why most of the hosters do start real map, as it is known and people dont have to put anything into game just start botting and thats it. I wouldnt call them retards as you did but I would definitely say that they lost meaning of the game. What I am trying to say is, if you want to have great custom server and have good outcome, you have to give it a time. It might be that within 3 months you will have 10 people playing, but you need to think how can you attract people, not by asking who will play, I can tell you now that I am going to play your custom map server, are you going to believe it?
Enough of my nonsense speech :d, I think that people definitely will appreciate minimized real-map. What do I mean? Custom map with parts similar to real tibia. Your cities should be close enough(not like big ass gaps between cities) on the map and roads to it should be mixed up with large spawns and those unexpected monsters. Also, for the starters if you die below level 50 for example, you will not lose anything from you inventory as I think thats what scares people if they choose custom server, they dont know map and are scared that their time will be wasted if they go some places and meet some monster that is too strong and lose all.
I remember back in 7.7-7.9 times there was 3 servers that were made like I said before. They had minimized tibia real-map(for example if you went to some of the places it was similar to tibia map that you knew what u could expect but it wasnt like ripped off real tibia map) they had level protection stuff and you could easily explore things.
Dunno if you gonna read everything but just what I thought about that as OTS were great back at the start, when you hosted them at home and waited for those 15 people to play for few weeks and when you achieved that you were da man!
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Anyway good luck and if you want to have outcome you gotta put much much time(nowadays money too) into server!