In the five and a half years since the first Automobilista game launched, GTPlanet's users have made three threads and 641 posts on the series - or one post every three days. That's not enough traffic - and by a couple of orders of magnitude - to merit a dedicated forum. It's not like there's so many threads they need an organised place for them...
We've tried, with front-page articles on the title and updates, but interest in rFactor 2 is low.
There's a thread on the first game which has 5,000 posts in 16 years, and one on the second with 2,000 posts in 11 years - and between them they account for about 92% of all rFactor posts. A post every two days is again not particularly high traffic, and there's not too many relevant threads (about half of all recent threads are @GTPNewsWire auto postings from front-page articles) for people to get lost in requiring a sub-forum in which to organise them.