I think I said my piece on the Site Feedback thread. I'm 50-50 on this one - parody is something a lot of companies that produce anime allow and turn a blind eye to, or even encourage, because it gets them a following in a very competitive industry. If they blocked off fandom celebration (i.e.: controlled cosplay and fan merchandize/doujinshi) fans would comply - but then move on to another series and celebrate that instead. Anime markets and fandoms are pretty much about the freedom of sharing and trade. You celebrate the talent of others, not just your own. When parody items are made, free marketing is extended to a crowd of people who may not know about the series yet.
From the independent creator's point of view though, they'd be missing out on potential profit. Perhaps their revenue is lacking in terms of merchandize and they'd like more - and this was a chance for it. I won't fault the creators since they did work on creating a product. Perhaps they're not really big on the anime fandom itself, or it's very different where they live. They have their own way of thinking too. Gaia might do well to ask before making parody items based on independent creators' works.
I was told about the game earlier and was about to look into the premise, but I'm personally not touching the game with a ten yard stick now after seeing that post. sweatdrop If they're that protective of it, they won't like me making parody or fan art of it, and giving it to friends or selling these drawings for charity. I do the latter quite a bit... and well, I give some of the printed stuff I make to the kids at the shelter for their back to school day. I just sell the rest to buy them reference books which they hate me for doing lol
If I can't do that with this game I'll just find another. I imagine it'll be the same for others, Gaia included. No big deal really.