Event-based milestones

[whitep4nth3r]

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@matthewbrandt say more!

[matthewbrandt]

Currently spawns only occur based on stream-based events (follow, start streaming, etc.) There are many, many other cool events that could spawn items in the world such as:

• nth follower milestones (10K in any claw member)
• nth player that joined p4nth3rworld
• nth item to spawn
• any player reaches n wealth
• any player reached n items
  etc., you get the idea :)