I'd be more inclined to scale it based on total revenue. There's a big difference between having 100% of a new market you just recently created that only makes

I'd be more inclined to scale it based on total revenue. There's a big difference between having 100% of a new market you just recently created that only makes $1M/year and having 90% of a decade-old market that makes $10B/year. (That said, there are a hundred other things that'd need fixing for such a hypothetical to be viable, let alone desirable. This was just the thing that stood out the most to me, particularly on a site centered around startups.)