It should stay. I sold two boats on OSO and used the Forum both times and the classifieds once.
I look at both to see who has what for sale. I do not mind doing so.
The only reason to do away with the forum is for money. The only way you will convince me otherwise is to let Platinum Members post boats for sale in the classified section for free.
The incrementalism of ever increasing costs to participate on OSO has been going on since I joined back in 2001.
To think or state the motive is anything other than $ motivated in naive.