From what I could gather there, it seems that, while they're signing up people, they need more investment to keep going, and no one believes that they'll be able to raise more investment any time soon. And it might be true. Signing up 200 free accounts per week may translate in to $0/month revenue (or -$x/month if you count expenses), so 'signups per week' isn't a great metric to judge on, although it's the only one we've been given.