Just to state; I would
never buy a clipfile, nor plagiarize one in any render I published.
I believe in creation for creation's sake. On all of my renders I've published, all work has been original(barring model usage etc. where that's been credited. (here, I make an exception, because I'm sh*t at modelling
), and I would hope that all in this friendly community would be the same.
The ones I'd worry about stealing work/clips/.tgd's/etc. would be the silent ones who never post anywhere. I'd never post any files/projects I've shared here on DeviantART for example, people are keen to take in general, and give no credit if it makes them look cool, I've been subject to it and I'm not even selling it!
The TG truists here, I believe, wouldn't steal work from each other but, I still feel comfortable sharing Terragen work here, hell, you're a Terragener, you understand. eh?
It's still nice to see my planetery grass shader©(the one I come across most in public without credit) on someones site.
I know I've made it, even if nobody else does!
Unfortunately, it's pretty impossible to police that area and anyone, be it Frank et la gang, Planetside, or even Xfrog(although, Xfrog are pretty thorough and police-like in their approach to their product, and this is a good thing, mind,) can't be 100% effective in this area.
First off, to be a distributor/publisher you have to first accept that you are willingly supplying content, to anybody on the planet with internet access. Can you find all of the ones who steal that product, take them to court, win a suit? Nope. It must be accepted, and trusted that you will recieve profits over and above the losses to justify the purpose at all.