Does this help at all: https://support.mozilla.org/en-US/kb/windows-sso

Does this count:

I gotta hand it to Samsung that they outline all the open source licences they use, at least in their Galaxy smartphone products:

Not automatically. You had to click ‘sign up for threads’. Still, it was very seamless and even let you auto follow those you had on Instagram, so the user count was definitely inflated. It’s not surprising the number of active users are way down.