The majority of people I've notified have left comments in the gallery and appreciate seeing their products in use.  I know that I'd enjoy it if I released a product or freebie. You can take a look at my gallery and see that it happens. If somebody doesn't respond, I won't notify them in the future if I use their products. It's not a problem to me if they don't leave a note because everybody is busy and there's no way of knowing if an old email address is still valid.

I can understand the logistics issue that a lot of people have keeping track of readmes and products. Once a product is installed, the readme very quickly get unassociated with it.

In my case, I've played around with Poser for a long time. Back when 20Mb hard drives were over $300, I learned the hard way that a large runtime quickly chokes a computer and older computers were slow opening up a large folder full of items in the Poser library. Deleting Poser content is a chore because of all the locations that files go. I got into the habit of only installing content when I need to use it. That makes it easy saving a note file of what goes into an image because I'm only doing it for the files that I'm immediately using. I've built up a good visual index of a lot of my content so I don't rely on my runtime for looking at my content, but even that is fast falling behind. For most people, installing to their runtime is the only visual means of seeing their content.

A nice feature to add to Poser or DAZ Studio would be a library right click on a thumbnail to find copyright info on a file. Poser files are large text files, so it ought to be easy to set aside early comment lines for that purpose. Since they're comment lines, they're backward and forward compatible because they do nothing to the file structure that any software program uses.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon