This data is shared for scientific purposes only. 
The original copyright lies with the respective list providers. 

We see this as a public archive/mirror, such as e.g., the Internet Wayback Machine:
https://web.archive.org/web/*/http://s3.amazonaws.com/alexa-static/top-1m.csv.zip

The original copyright takes prevalence, but we operate this mirror 
under CC BY-NC 4.0 [1]  for non-commercial purposes only. 

[1] https://creativecommons.org/licenses/by-nc/4.0/