Getting really tired of proving I'm human every time I visit a website. It's about 90% of the time now.
IP/subnet reputation. Either someone in your house has a hacked device, or someone in your neighborhood or IP subnet does, or maybe they were used as a residential proxy due to a router with a hardcoded password or something.
The problem for many sites and apps is that it's basically impossible to tell one from another now.
Soon you'll have to prove you're an adult the same way to click through for cookies. Can't wait.