Well I've got the 100 post part, just not the 30 days. I've only been here about 7 (if that), which in saying that, scares me to think how much I've actually been on here to already HAVE 100 posts!!
IMO used to be open for all, and that's what it turned out to be a Free for All- basically. It also has an age requirement as well. You have to be 18 years old to post there.