My recollection is that they advertised and got Important People™ to post there as part of their invite-only beta. Don’t quote me on this, but I believe they paid some of these people to create accounts and post there. Not sure if that was a rumor or not.
I think this is not quite correct. You’re absolutely right that 6 weeks is basically the same thing as a full ban, but it’s based on last period rather than from conception. Which is even worse. They assume that women conceived the day after their period.
A woman could become pregnant late in her menstrual cycle, but the 6 weeks counts from the previous period. So she could really be only a few weeks from conception but closer to 5-6 weeks based on the ban math.