The internet was great before the great monetization of it, had tons of information provided for free with no ads. After ads, it will still have tons of information. Stack Overflows will still exist, Wikipedias, corporate blogs that serve just to boost the company, people making courses and other educational content, personal blogs (countless of which make their way here), all of those will continue to exist.

Ad-driven social networks will continue to exist as well.

The age of the ad-driven blog website is probably at an end. But there will be countless people posting stuff online for free anyway.