I think I was 11 or 12 when I started plaxing Tibia (a very early MMORPG). I really enjoyed it. At some point I found out that somebody has leaked the source code. You could host your own Tibia server. You could create new map segments or introduce new quests by Lua scripting. There was a huge community for “Open Tibia”, hundreds of servers with thousands of players. First, I got into mapping, then I got into scripting and loved it.
It’s a management decision. Even if the responsible developer left, the next in line would take up the job. We work for a living and there is little choice in ethical companies you can join for adequate pay.