The site you went to was a sponsored site for business use which does have to be paid for. As a rule of thumb when googling for free software downloads it's best to avoid the sponsored sites at the top of the results page, and in this case go to the next one down - openoffice(dot)org
openoffice(dot)org-suite(dot)com is a scam site, check out the disclaimer at the bottom of the page:-
Disclaimer: This website has no affiliation whatsoever with the owner of these software programs,
Also read the reviews on SiteAdvisor, these people may have pulled the wool over the eyes of Google and McAfee, but you aren't the only ones to spot it for the rip off it is. A similar operation is the so called OpalOffice, all they do is sell a download link to OpenOffice.