Can't sign up for a "New Customer" offer? I've never shopped with Micro Center before.

I'm attempting to sign up for a particular new customer offer from Micro Center that caught my attention from friends but am being met with this error:

"Thanks loyal Micro Center customer, but this offer is for new customers / limit 1. Be a great friend & share this page with someone new."

This is surprising, as I've never made a purchase with or set foot in a Micro Center before. The mobile number I use was given to me January 2020 and my carrier is known to release numbers for new plans after keeping them out of the system for a time. Is it possible that the previous owner of that number signed up with Micro Center previously and I just can't use any new customer coupon myself in this instance?