• You hold "Tribal Knowledge": You are the only person who understands a specific legacy database script that would break the entire project if you left.
• You are willing to Relocate: If you are remote but offer to move to a Hub (e.g., Waterloo or Gaithersburg), they might keep you.
• You are "Cheap": If your salary is significantly below market rate, you might fly under the radar.
Bumping this from @ac+1kfv3g2sk, I think this gets it right.