https://invisioncommunity.com/files/file/7931-number-of-topics-per-forum
Useful in support/study groups boards, this plugin will control the number of open (unlocked) topics that each user group can have in each forum in a specific period ( per hour, per day, per week per month or per year), by adding a new tab on MANAGE FORUMS, listing all groups and allowing enter a number of topics.
Settings per forum:
Number of topics per group
Period: per hour, per day, per week, per month and per year
I am willing to pay for this. Thanks!