1. Chrome beat Firefox in the stability/security area. Its usage of multiple processes, sandboxing, etc is excellent, while Firefox failed to adapt. Servo seems to have an excellent potential for coming up on top there, being both more secure, and having higher performance.
2. There are actually markets interested in security. Think say, banking, military, industry, IOT. There are various laws coming requiring companies to take security seriously. Servo has a lot of potential there too. There's potential for both projects that have security as a selling point, and regulatory compliance.
3. Embedding. Like I said, using a web engine as a component seems to have been forgotten in modern times. Surely that can be sold to somebody, because there are plenty use cases for embedding web engines in stuff.