Edit: He is already aware of this thread. He edited his 35 bounty posts and wrote deleted after this post. He also applied to Stake Signature Campaign Without answering the question. 
I assume that some accounts that are sold or changed hands especially high rank accounts are highly motivated to join this signature campaign. Do you know what the main conditions are? The manager only requires each user to improve the quality of his posts for one month and be sufficiently active in the gambling section before he is accepted into the campaign.That campaign will quickly turn into a spammer field where some the accounts are actually owned by one person. If the stake does not allow participants to register an account on their site using a VPN or TOR, then they really know who has joined multiple accounts in their campaign so far and is receiving payments from the same IP.