There is absolutely no reason to play 8.6 if it wasn't for botting. That's the only reason why 8.6 is popular.
8.6 has nothing special in terms of feature and content, it's a random Tibia version that happened to occur at the same time Ekx ceased ElfBot production.
If ElfBot was still updated to this day, then there'd be no 8.6 servers, just latest version.
That said, if you're hosting an 8.6 server, you're pretty much totally in open arms to accept cheaters.
It is unfortunate that it had to come to this, hopefully people can move on from 8.6 and try new things. I'm someone who totally advises against using 8.6 and pushes people towards the latest client.