nido, you bring up a good point.
From what I've observed, there are two aspects of logopond - the gallery (good for inspiration for designers and research for clients looking for designers) and the other is the forum. The forum is primarily for designers. While there is a marketplace section, it's not linked from the homepage of logopond.
All that being said, I don't know if a monthly "featured post" on the home page would benefit the majority of the site visitors.
What I would like to see is at least a small section on the home page, above the fold, that would highlight the marketplace section of the forum and MAYBE feature posts. The only problem with "feature posts" is that the majority of posts in the forum are critiques. It's not like the forum has tutorials or anything like that.
But by highlighting the marketplace, that could push people away from contacting gallery designers directly and instead thinking they have to post to the marketplace.
There are two distinct parts of logopond and I'm not sure if/how they could be combined.