Not all dms are restricted here. There are users who restrict newbies from sending them private messages but I will not think those promoting a service here will have that enabled as their clients can be from any forum rank.

To answer your initial question, you can host your signature campaign if you feel you have enough experience to do so and plan to escrow the funds. As a newbie, users will not be interested to join your campaign except you proof you hold funds for payment and escrow that with a reputable member.

- Jay -