Very rude guy just called. He had no idea who he was speaking to, or what company he had called.  When I told him we weren't interested in his offer, he accused me of being a cheap $10 an hour secretary who wasn't paid to be smart.  Because that seems like a good way to drum up business....

As noted above, their website is rdibizdev.com.  Sending Email to the address shown there rarely gets a reply.
Requests to be added to their do-not-call list is interpreted to mean the only the do-not-call list for their one vendor, not all RDI vendors.  Their posted privacy policy is just whatever gibberish came with the web page template they got for their web site.

Soliciting for "RevCorp" an IT consulting/staffing/headhunting firm.  I told him we don't use contractors and he offered to remove me from their database.

The name on the was/is "RDI".
I found their web site at http://www.rdibizdev.com/ out of Chicago, IL.
They're a telemarketing firm for business leads, which is exactly why I chose not to answer the phone.

solicitor