If you aren't already getting regular emails from recruiters on linkedin.. turn on the account settings allowing them to contact you. This is a significant part of LinkedIn's business.
The parent did say "good". Contacts via LinkedIn are almost complete spam.
i found the following settings but i didn't see anything specifically about allowing recruiters to contact me. i do allow anyone to contact me though, so maybe that is included in that case.
Share job alerts
Use your job alerts to signal interest to recruiters working at those companies?
Share resume data with recruiters