Moonblaze meant space as in storage space, I believe. Space isn't very close to being full from what I've heard. Data transfer is something else. Data transfer is how much of that data is moving. Every time you load a page or download a file, it takes up some of the monthly data transfer. This temporary signup has nothing to do with space concerns. It was implimented because there was spamming, and the spammer kept making new accounts. The temporary signup ban denies the spammer of the ability to create any new accounts, and thus stops him from posting. Space has nothing to do with it.