Sounds like 777Coin has some some of you wrapped around their finger and a prisoner

They owe you money, and you can't remove your Signature until you are paid?
That doesn't sound very fair/legal at all...
Not correct. Any participant is free to leave the signature campaign any time. In another campaign manged by same manager and owned by same person, the manager paid a member for all previous posts even when he left the campaign in middle.
They are "free to leave at anytime," but they won't be paid what they are owed if they do...