It was 750M in the last quarterly shareholder letter on 2/11, so we gained 181M in about 70 days, about 2.6M/day. That'd put 1B around 25 days from today (5/18) assuming no growth. Since there will be growth, and since it's likely that on 2/11 it wasn't exactly 750M but some small amount higher, I'm guesstimating Thursday, 5/14.