I skip anything with the non-commercial usage tag. Really, there is no better advertising of your product than to have it used in a commercial render! I have no use for restricted freebies. I have helped many creators sell their stuff. I get an email asking about a prop or character, I send a link to the maker's site. I buy a lot of stuff and having useful freebies is the best way to get me to make the decision to purchase. If I cannot use it in a commercial render, I won't try it, and I probably will not buy anything from the creator because they are stupid enough to put that restriction on their freebies.