I might better elaborate - back then the forum was a specific platform(hosted by the publisher/operator) and such features was not really available. Well, it was but you had to pay. That forum platform is not available anymore, is outdated and likely there are no backend components to control purchases and turn it into a forum section. If it should be done it would likely be a section on Discord - but nowadays anyone can get this for free, so it does not really make sense.