You can take a closer look at the ANNs for the relevant bounty you are participating in. In general, these rules will be clearly listed there. You simply complete the tasks that should be completed according to the rules they provide. You do not have to send new topics. No bounty manager will ask you to do this.
The project that I'm participating right now indicates that We only have to make 10 post per and have to be atleast a Jr member to be able to join the campaign so that means that I have make 10 posts about the project or any replies in any thread will do even if it is u related to the project I'm participating in as long as I am wearing their signature?