Very nice issue The-Great-One! As an artist once mentioned in a previous issue, I'd like to throw in my two cents on the "You May Not Use This Work for Any Purposes". Speaking for myself, I upload my works under those terms assuming it's just like saying "All Rights Reserved", i.e. the default rights one is entitled to unless stated otherwise. Newgrounds would put my work under a special Creative Commons license if I specified anything else, which is usually not my intention. Though I can't speak for others, I certainly wouldn't think a shout-out as you've been doing would be something undesirable, nor do I think it could be construed as a bad thing. This isn't the conclusive answer you may be looking for, but I hope this helps!
SkankyMojo
Thanks for the mention. <3