Hello robin,  As MattBx8 stated, b y     default     a link such as     <a href="https://app.roll20.net/campaigns/details/1234567/s" rel="nofollow">https://app.roll20.net/campaigns/details/1234567/s</a>  ... is      only      visible to players      already    in the game, and only     Plus and Pro     subscribers      can    make their games     visible to the public  , but even then people not in the game can not post to the forums.   The best way to handle this situation is to  create a Looking for Group listing ; even if you do not enable it for viewing in the LFG Directory you can share the  link  with others and have a separate  Listing Discussion forum  just for those potentially interested in your game. As a bonus, anyone who posts to your game's Listing Discussion forum will have a  big blue button  by their username and all a GM has to is click 'Invite to Game' and an invitation will be sent their way.  I hope this helps, happy gaming! :)