Quick question, I see you have a nice-looking referral program, would you allow signature campaign participants to use their referral links (if they have any) in their signatures? Of course upon the approval of the campaign manager.
It's a simple way of providing more incentive to participants, motivating them to post above the maximum paid number, or to keep their signatures even after the campaign ends, so I thought there's no harm in asking.
If the signature campaign doesn't use UTM tags, it seems to me that there is nothing critical in adding a referral link to your signature. However, it's better to clarify this question directly with the signature campaign manager. Betfury representatives publish only advertising posts in this thread and have not communicated with users for a long time, so they are unlikely to answer your question.