The only times I’ve ever gotten calls from RingCentral, it’s been recruiters and staffing people. Those, like all unsolicited recruiter emails, go right to the trash. Never read, never listened to. Cold-calling and spamming just does not work, with me anyways. Maybe one day some recruiters will get the Inbound Marketing message.
Obviously I have nothing against RingCentral itself. It looks like a fine service and I wish them luck. It’s just that their only users I’ve met use the service for unsolicited offers.