You're wrong. You've glanced at those stats without even thinking about them.According to otserverlist the minority you talk about it's actually majority... Btw no one says that they should shut down tibia 11 servers, they just can try relaunching 7.6 for example
At this moment there is about 680 players on 7.1 - 7.6 server and about 9000 players on 7.1 - 8.6 versions, with ~7500 playing solely on 8.6 version. Total number of players on all servers is about 17700, so 7.6 players are in minority and the number of 7.1 - 8.6 players barely classify as majority. Giving example of relaunching 7.6 server was poor choice. And even if we assume relanuch of 8.6 version, there is still the matter of many servers not being vanilla servers. Most of the server on 8.6 version have a lot higher rates and other features like custom map, fast attack system or others. That confidence of yours shouldn't exist.