According to their website:

Freelunch.com is a free service provided by Moody's Economy.com, a leading independent provider of economic, financial, country, and industry research that helps businesses, governments, and professional investors worldwide meet their diverse planning and information needs.

Our databases contain more than 165 million economic, financial, and demographic time series covering more than 180 countries and their sub-regions. Accuracy and timeliness are two of the hallmarks of Moody's Economy.com economic databases. Our dedicated Data Services staff regularly runs data accuracy routines to verify the integrity of our databases. Additionally, with offices in London, Sydney, and the U.S. our staff is able to update our global databases in real-time ensuring up-to-the-minute data.

It should be noted that the site offers premium data for an additional charge. Also, according to the help page "You cannot change the data specifications [including the default time range] on Freelunch.com. However, you can change the elements of how data gets displayed in Moody's Economy.com Research Store." The site does not explicitly state that the data you obtain at no cost is completely unencumbered, but it also doesn't state (at least not that I found) that there are encumbrances.