If you like the terms but you have bad luck and you come late to download it?

Then you're out of luck. The same thing happens if a merchant passes away. You want to buy his products, but you can't, unless his heirs agree to keep selling them. And usually, they do not understand Poser well enough to do that.

I said: a repository would be a nice idea; but while laws are laws that's impossible to do

It's not impossible. Just get permission. Many freebie makers do give permission. I am hosting a couple of Lourdes' freebies; she lost her Web site, but posted a message here granting permission to redistribute. There was a whole thread once, of people announcing to the community their wishes for their products should they die or disappear.