CLEAR is not sustainable. It took me 10-15 minutes today to get through security with clear and pre-check. I'm not complaining, it may have saved me missing the flight, but it's lost its dependability.
In order for them to justify paying people to walk you to the front of the line, they need enough customers. If they have enough customers, it loses the draw of no lines.
This is the line, to get to the clear line, to skip the security line.