

These CAPTCHAs do more than just check if you clicked the right pictures. They analyze your mouse movements and stuff. For example, a bot would move the mouse in perfectly straight lines, click all the pictures quickly, etc. But a human would have more natural movements.
It doesn’t have to be that expensive if you keep it modest though. I have an old Dell Optiplex (I think from 2012?) that I run a fair amount of stuff on. Things like Jellyfin (with Sonarr/Radarr/etc), a finance tracking web app, Home Assistant, a wiki, and some other miscellaneous stuff. I don’t have a ton of storage though. Currently just the 512gb SSD that the OS is on. I have a couple 8TB HDDs that I want to get setup but they’re a little loud for being in my bedroom.
The big thing I notice is that it can really struggle to encode media if it’s not in the right format. It doesn’t have much of a GPU though so that doesn’t help. And more modern hardware would be much better too, but this is fine for my needs at the moment.