Looking at other parts of the site, I expect it's attack/abuse mitigation.

These unfortunate souls are trying to host interesting free content. I expect they are getting crawled to dust and unfortunately, so much nuisance came from your country's IP range they had little other option but to block it.

"We are currently unable to steal your data, please check back later."

> GDPR?

Unlikely. I’m in the EU and can access the website just fine.