I found most recruiters will email you back telling you to give them a call. I had a few recruiters email addresses and I would intentionally miss there phone calls, they would leave a message for me to call them back. I would then email them and they won't say much thru email. Almost every email was to give them a call could not get a single one to talk thru email. That should be a red flag right there LOL. That was the recruiters with the mega carriers. If they make a commitment thru email there is a paper trail and it's harder for them to deny you what they promised down the road
Doesn't look like it with Prime, Inc.....looked all over their site, mailing address and a bunch of phone numbers is all I saw.
A lot more of these places are putting a "live chat" option on their web sites....you can 'chat' with a recruiter during business hours. That way you can remain anonymous, yet still get the BS sales pitches, only in text and not voice.