All pools are divided according to a certain ratio.
For example, 15% for the signature and 15% for the content, but not all people participating in the signature will also participate in the content and vice versa.
Also the manager will consider the site traffic and the participants. Of course the existence of the forum is another plus factor to put higher allocation over the new one. Traffic is important to rate how's effective the promotion is. Allocation is good but the payment is much better specially if the token will have a profitable value few months after listing.