I don't think/know if there is another forum that does this type of advertising, which is another reason why this forum is unique and awesome!
Yep. I've never seen any other sites utilize signature advertising so this forum does indeed seem unique. However, I sadly don't think it will last long here if the spam situation isn't controlled in some way.
Can you write list of websites where money can be made online with signature campaign (like on bitcointalk.org) ?
I don't know any other sites with active signature campaigns going. There's another less active bitcointalk.org and also cryptocointalk. Try those.
I'm not that familiar with the site but there doesn't seem to be any in their services section
https://cryptocointalk.com/forum/2418-services/I don't think any other crypto sites are really popular enough to benefit from signature advertising so its likely not worth it to the actual advertisers wheras it obviously is over here because of how bustling with activity it is.