The market supremacy came afterwards, not before. Most people don't want the expensive premium version - they want good enough at a low investment. And that's fine
There's also a segment of the market that wants the FLAC, premium handcrafted experiences at top price. They're not in direct competition and both can co-exist
My initial point was that companies can't just exploit consumers relentlessly because the market won't let them. The good value option can't just box people in and show them only ads. I bet YouTube would love to show you unskippable ads for 75% of the video length. Good luck staying market leader with that
I don't think Google is a good example here. They've been actively trying to fight and failing against SEO and affiliate spam for a decade. No-one else has solved that problem either which is why Google remains at the top. I personally had a hand-crafted content site thrown out of their search results because of them going after spam