But you must be minimum a full member, look at here:
https://bitcointalksearch.org/topic/da-dice-signature-campaign-2o-closed-1078943
Dadice signature compaign Closed due to some reason..
Da Dice has been brutally attacked by some logically nutty reputed members from here (these guys virtually attack everything they "think" suspicious. Word is that they store their cents buried in chests underground and worse, esp. after Greece. Can't trust these banks, you see?) and some ambitious members and some who hate everything related to Da Dice for some yet unidentified reason. The management is tired of all this, and has decided to withdraw from the forum and in effect all campaigns have been closed.
I suggest you join another signature compaign but first become a full member.