As everyone else has said, we give away freebies for many purposes.
Sometimes I give away stuff that my creative energies just ran out, and I did not complete everything I wanted to incorporate, Sometimes its a sample of a larger product. Othertime, I just make things strictly for a freebie, usually I attempt to make somethig oncce a month as a monthly freebie (though my new job has been sucking my time up so I have had little time to make anything let alone freebies)

aka MCDLabs
also known as Daniel Merrill a grumpy old disabled Jarhead.
checkout my freebies at
https://www.sharecg.com/pf/full_uploads.php?pf_user_name=mcdlabs