Unexpected announcement from Amazon: alexa.com is is shutting down soon after 25 years of service. Apparently collecting website traffic statistics is less profitable for Amazon than AWS.
The site alexa.com was founded in 1996 and was bought by Amazon in 1999 for $ 250 million. The payment was made in Amazon shares. The rating of a site is still available if you type https://alexa.com/siteinfo/<some domain name> in the web address bar of your browser.
or using this HTML form:

Get alexa.com ranking of some site:

Example: