Allow for some won't advance from today's value and some will advance an insufficient amount and not return. It will be 1/4 of those 32 and possibly a new ~90-120 users of which ~20-25% will exceed 200 in the next 4 months.
I prefer that calculation to a simple linear estimate because it models what is likely to happen better.
Of course both our calculations omit Larry's excellent recruitment skills (along with some assistance from others) at the recent conference.
Thanks for converting that answer to a comment - I wrote a Meta answer to address that problem. Convert answer to comment was a good move. I agree that they got their sS's backwards too. :)
