Who is PG referring to as the fastest growing YC startup? (twitter.com)

anyone know who launched around july 2012 or earlier?

And the real questions: why not a log scale for the vertical axis, and what is the vertical axis measuring? [is it $/month, $/week, total revenue, profit?]

my guess would be instacart, goldbely or teespring. But there are probably some B2B contenders I haven't thought of