[soheil]

What about the new users visiting the site for the 1st time in that small downtime window? If their first experience sucks there is likelihood they won't come back.

So:

(number of new users) x (probability of those users not coming back) x (lifetime value of a youtube user) = I highly doubt this is equal to 0

[tengbretson]

I truly believe that the number of people that navigated to youtube for the first time ever in their lives during that window might actually be 0.

[soheil]

So you believe YT's growth rate == 0?