What the math doesn't cover is the cost associated with owning 1% of the search market. I would imagine the costs associated with owning 1% and 50% of the searc

What the math doesn't cover is the cost associated with owning 1% of the search market. I would imagine the costs associated with owning 1% and 50% of the search market are pretty close (think all the costs of crawling, storing, and indexing). You may not be able to survive in the space with a 1% share, even if it is worth $1B.