A lot of tech industries seem to be winner-take-all, so aiming for 30% might not be a sustainable plan in many cases.
Profitability and growth aren't dependent on market dominance, even in tech.
Vimeo aims for $100mil this year: https://www.reuters.com/article/us-iac-interactive-vimeo/iac...
YouTube Could be a $15 billion business this year: https://www.fool.com/investing/2018/02/18/youtube-could-be-a...
Even in your article it talks about how Youtube isn't exactly profitable, and is dragging down Google's average CPC for the business.