When they first came along, a few years ago, they were fine. Then things started going downhill and they left owing money top a lot of people.
I did question the GMail address, but I figured they were trying to avoid emails from people who were owed money from. I think they were trying to recruit a select few. I also think they were hoping I would start promoting them before receiving the payment.
Honestly, I just wanted the money the company owed me from the past.