This number called several days in a row. When I answer (with a single "Hello?"), there is no immediate response, telling me that the caller is using an automated dialer, so I hang up. But today, I decided to dial them and find out who they were. With nothing identifying the company, I got a recorded message: "Your call is very important to us. Please hold and the next available agent will assist you." I put the phone on speaker  and decided to wait it out. After six minutes, with the above message being replayed roughly every 30 seconds, another recorded voice simply said a polite "Good-bye" and disconnected me.

Whoever this is, they're extremely shady, and don't want us to be able to contact them. Avoid. Report.