ShareCG is a business. It is an unsucessful business, (at least not sucessful enough for the owner's liking), yet it has existed for many years. I don't believe it could have lasted as long as it did if it was taking a loss the whole time.

Some people are misplacing a sense of gratitude that should be directed at the free stuff creators. ShareCG doesn't give you free stuff. The creators do. ShareCG has made its living on free stuff. 

Download my free stuff here: http://www.renderosity.com/homepage.php?page=2&userid=323368