I also have joined as a craiglist poster in WFHHQ & WFHCB. In my opininon, there's only a very little possibility you can post 50 ads / day.
It's not easy to understand the system of craiglist. I have account in craiglist. From this account, I limited my post just 5 ads per day. The posting results is different every day. One day all my posting was approved; but on the other day, craiglist flagged all my posting!

From my experience, besides other rules such as too much posting, too near space of time between two posting; craiglist tends to flag the ads with more than two text lines. So sorry I can't help much.