for the Bitcointalk signature campaign in the rules required to post 5 posts with at least 35 characters is very easy but there is no limit to participants, this allows the number of participants to be numerous and of course the number of results to be distributed depending on the number of participants who participated in the signature campaign this.
The only limit is the rank. However, this is in line with one of our most important goals: Namely to spread bwomm to a huge number of people and make it accessable for everyone.