I honestly don't remember exactly what the problem was, but I was responsible for the bug that caused DW to have to do a second seed account sale when the site went into open beta (there was only supposed to be one). There was something that prevented a large number of users from buying seed accounts (I think it may have been people who were creating brand new accounts, as opposed to those who had accounts already but were upgrading), so we felt that we had to give those people another chance by doing another sale. Oops.