If anything, the placeholder posts are better at avoiding confusion than having to post an offer right away. Look at it this way - If you see something offered that you need, but you have to go figure out what you can offer, then it could take several minutes while you paw through your stash and write it up. During that time, someone else could have posted an acceptance and new offer and you wouldn't even know until you hit submit.
Placeholder posts only take a couple seconds, and as long as nobody is taking forever to update the post with an offer, I don't see anything wrong with them.
Placeholder posts only take a couple seconds, and as long as nobody is taking forever to update the post with an offer, I don't see anything wrong with them.