Technically they haven't made your personal information available publicly. It was already public if Google managed to get their hands on it. They've just made it easier to find.
Making things easier to find can be a threat - it's why there's a lot of compelling discussion around websites that take rosters of arrest records and post them on big scary websites along with pictures and lurid descriptions of the person's crime - offering to remove the information for a fee.
The US needs a GDPR-equivalent law.
And the only way to opt out of it is to not use credit cards.
Is it somehow OK for someone to build a dossier on another person as long as they use that information for their own purposes?
Source, please.
https://www.google.com/search?q=Google%20buys%2090%25%20of%2...
The "90%" might not be easily sourced, but also not the crux.