Ask HN: Name those websites that limit user logins per day?

Example: US Visa Slot appointment [1] portal limits the user login to 3-5 a day with no more than 20-30 refreshes per day. I understand the limitation was to restrict the bots from misutilizing.

I am curious to see what other websites limit the user logins per day. My intention to categorize all such websites.

[1]: https://cgifederal.secure.force.com/