The LinkedIn hidden search operators are back! Nobody knows for how long they will work this time (we enjoyed them for a year and a half a while back). But they offer any LinkedIn user, whether basic or paid, significant searching power and a filter unavailable with any subscription.
LinkedIn never documented the operators, apart from the less-useful firstname:, lastname:, title:, company:, and school: (all achievable via the advanced dialog). Nobody has any idea who had implemented the other ones. But the code came alive again.
The operators were featured in Nathan Palin’s Bellingcat’s Invitation Is Waiting For