Why do they do that? Sorry, I don't speak Spanish.
Here's a good English-language article about it, with a timeline: https://daniel.es/blog/cloudflare-vs-la-liga/
Looks like same old regulatory capture.
Because LaLiga and football in general is what is governing Spain really.
to stop people pirating football streams while matches are on. Insanity
The website has a language selector on the right just below the initial screen, just FYI.
to """"""""""prevent piracy""""""""""
The football league would rather not have pirates livestream their ~90 minute games.
Pirates would rather not be blocked, so they create a new, disposable website for every game. Any blocking must happen fast.
Cloudflare would rather not block websites without a court order specifying the sites to be blocked.
The courts would rather not create a special fast lane through the courts, just to resolve a squabble between two huge corporations.