Q: How does The Traitor interact with Silver Lining (or other Rules that let you ignore Creepers)?

A: When The Traitor is in play, that player is the only person who can win, since if anyone besides them wins, they steal the win. Normally, since it’s a Creeper itself, it means that they can’t actually meet the win conditions themselves, because The Traitor prevents the win. However, with Silver Lining in play, all this means is that, in addition to being able to win when someone else meets the Goal conditions, you can also meet the Goal conditions to win under your own power. It still pretty much sucks for everyone besides the person with The Traitor in play.