wpDiscuz has dozens of paid addons. You can extend this plugin without any limits..
All wpDiscuz addons are being developed by wpDiscuz developers at gVectors Team. These addons help us to keep top level development of the free wpDiscuz plugin. All essential and even dozens of extra-cool features are already available for free in the core wpDiscuz plugin. There are not any limits, any pro and paid versions of wpDiscuz. We have another dozens of awesome features in our to-do list which will be added for free in the future releases.