Flickr

Flickr is a photo sharing site and it is currently owned by Yahoo!. It initially launched in February 2004 by Ludicorp (a Canadian company). The site was bought out by Yahoo! (an American company) the next year. Considering that Yahoo! has a tendency to buy popular sites in order to retain their dominance, this is not a shocker.

In 2007, Yahoo! forced users to migrate their accounts to Yahoo!'s services. Yahoo! also enforced a sort of region protection - that is users from places like Germany and South Korea cannot view explicit or even moderate content in order to prevent their governments from blocking the site from said countries. This is ironic, considering how democratic the countries usually are.

The site is constantly watched over by the US Department of Homeland Security, in order to watch over any form of suspicious activity.

It is currently the 31st most visited site.