Are Gmod servers still profitable in 2020 and for the next 5 years?

I've thought about this a lot, I love gmod and hope it never dies. The facepunch forums are shutdown forever,Itwas the heart of all gmod errors/solutions/content. Do you think this is an indicator of it's lifespan closing?

Say it doesn't survive another 5 years, what servers do you think would be its replacement?

• Minecraft
  
• Fortnite
  
• Roblox
  
• Virtual Reality platforms