You should wear signature code to advertise the project you are endorsing, In a way you get paid after ICO. Signature campaign is a high paying bounties and you should be focus at all times especially when posting a message.
Yes all you can say is correct and I think one of requirement to be qualified in All signature campaigns need to use avatars to be eligible to participate in a single campaign, only full members and above can use avatars, while members and jr.member can not yet use avatars.