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Many times I don't even get to the second step. I only click "I am not a robot" and I've passed.

Are Captcha's a paid service and my examples are sites buying into only the lowest level of ID?

Or is this something akin to a decision made vs my access frequency/behaviour where the algo decides it's reasonably sure I'm a human so no need to waste bandwidth on sending and confirming images?

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If you're not asked anything after checking the box then your browser's fingerprint has already been determined to be a real human by enough partner sites using the Captcha. Try opening a private browsing window and checking the box to see the second verification part.

They're run by google, so if you're a known "good account" it just detects that you have their cookie/are logged in and lets you through. Pop it open in incognito and you should get one.

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