This frustrates me too, if something is "opt-in", that means by default you're not included and can choose to be included. If something is "opt-out", that means you're included and can choose not to be.

But then it gets used to describe the reverse, and we have to add words to clarify.

I once saw a post here with a correctly described opt-in telemetry before, and the top comment here was attacking them for the reverse, thinking it was including them by default, so there's little winning, it's one of those words that has just come to mean it's opposite.

You were given the option to option in, by default. Clearly it makes sense, optioned out by default only happens when someone loses money on the option in default instead.

The internet really stinks. The 1999 teenager in me somewhere is really bummed.

Very true. I was considering PostHog, but this sours them in my eyes. Very deceptive wording.

Isn't it kind of like mandatory tip? If you haven't given it voluntarily, i.e .its automatically opted-in and you maybe can't even not give it. its the same.