Nothing unusual here.
I’m doing a lot of genealogical research and one German site responded “We see a lot of unusual activity from your IP address” after a lot of searches.
Another German genealogical site had an interesting replacement for Captcha. They showed a small graphic of civic records with the names, towns, and dates of birth of several people — in old German script! The security box showed the person’s name in light gray letters. You had to find the name in the graphics, find the DOB, and enter it precisely in the entry box. This has to be done for two people.
Very clever and a refreshing change from the damned Captchas.
By the way, I’m sure you know reCaptcha 11 years ago.
Never had a problem with CAPTCHA until a few days ago. I did have occasional problems with Google (perhaps when I was doing a lot of searches) but only occasional. Now it is 100% of the time.
I wonder if the ISP is in cahoots with the state/federal government, but your ISP isn’t...yet.