Rag three times and a hang-up with no message. Obviously fishing for a callback to avoid breaking the law, e.g., if they hang-up andthen you call back, they can claim you called them if you report it to the FCC, and they have a record that you called them..
When returned call, a recording claimed to be "Julie with Reward Redemption", and claimed I was referred to it by some unnamed company I'd contacted, then offered rewards if I pressed 1, or to be added to their do not call list if I pressed 2. I pressed 2.