If you use it, and a few in your network use it too, it can be very useful, both to find opportunities and to see who might be available. Most people change job

If you use it, and a few in your network use it too, it can be very useful, both to find opportunities and to see who might be available. Most people change jobs every few years, and this is just another data point used to stay informed. If you are a "lifer" somewhere, it is of no use. The level of spam I receive does not seem excessive. The service is free.