Earlier quoted context omitted.
Profit is every bit as fictional of an ideal as a pageview or user signup. Most business activity do not take into account the externalities (corn is "profitable" but heavily subsidized by the government and most manufactured goods end up in a landfill that's not paid for by the company) that are created but not accounted for in the "Profit and Loss Statement"
You can't pay your employees with page views. Profits (or revenue, to be a bit more precise), on the other hand, are directly exchangeable for rent, food, payroll, keeping the lights on, and other such necessities. The dollars a farmer uses to make payroll are fungible. It doesn't matter if they came from a stupid government subsidy or a sale at a farmer's market.
Most tech startups do not generate a lot of cash in their early stages, which is why they raise capital from investors who purchase equity stake in the company because they believe the company will be valuable down the road. Page views (and more so user signups/engagement) are one metric by which investors make the decision to invest capital.
Guys, this is what modern capitalism is all about.