A thread in the marketplace? Give it some time, you'll see most mine are a few days long if not a week or more.
Otherwise if you're a brand new user then just try to help a few people out if you see questions you know. They get a lot of users signing up just to spam their sites, so those users...
Oh have no idea, I've been a member there for years and have a ton of post.
Maybe @digitalpoint will see this and reply but if I was to guess I'd say 10 or 20 post and a member for a few days if there are restrictions.
Not really, here are my threads so you can see how it's gone for me.
Basically I give an outline of what I want, people submit designs and then I give feedback on those and wait for new images.
I've always gone over to digitalpoint to get my logo's done.
I've paid anywhere from 20 to 35$ for mine and you'll get a ton of submissions which is nice for me since when I start I really don't know what I'm looking for..lol
I ran across this post on twitter and asked for more info, I tagged @Kier and @Mike on twitter
He said he contacted you guys already about it as well.
feel free to move this thread if this isn't the right place for it