I know exactly what you mean. A lot of the time though...personally, I just don't feel like people deserve or NEED credit for something so small or simple, like a paper texture... or crappy stock images. Or it seems just silly to credit someone for using one brush, once in a piece of work full of tons of other stuff. It's such a bummer though because so much of my damn time gets wasted and I get SO irritated at all the stuck up, full of themselves, stock-providers here on DA who have 100 rules and want this and that from you. I'd honestly rather pay someone to stfu most of the time. lol
I don't even think I'll use most of the stuff, and even if I do, I don't know if I'll use it commercially or not... and I have about 50 gigs of resources...a lot which I now have to wade through due to me being unaware of all these ridiculous rules and restrictions when I first started downloading them, and me having enough respect not to use things like that if I'm not going to follow them.
I've still seen that the best resources I've ever found, all turned out to be completely free, no rules or restrictions and no credit needed. I find that somewhat over 90% of the paid, or shit with tons of rules and demands, is pretty mediocre and often just crap. Funny how that works.