There was one but it meant that any member could read the post, so a standard member for example could view both sponsoring and trader posts.
This is why it was removed.
However an unread post button would mean showing you potentially, especially when the site grows in size, scores of posts each day, meybe over one hundred when the site is in its maturity.
What we have is the ability to subscribe to specific boards instead.
This means if you have no intersect in CCGs or fantasy for example you wont be be told of any new posts in those boards.