Using the content of network users, is it legal?

Question

Computer networks

For example, jokes that are generated by users or somehow demotivators (graphics) or bashorg (text) are initially published on the 1st portal, and then spread throughout the Internet.

Is this the normal state of affairs? Why can't primary source companies (say bash) write a user agreement under which only they can distribute the content that they publish?

Just because it's impossible to check whether the first publication happens or not? Are there other aspects?

Are there any precedents for clarifying the relationship between different portals on this topic?

Answer 1

Why can't primary source companies (say bash) write a user agreement under which only they can distribute the content that they publish?

for it is not theirs. This author can still be indignant that someone posted his article / joke / photo somewhere, and the site owners are not involved here.

Answer 2

Demotivators and bash are too, IMHO, a highly specialized, if I may say so, example. For there are no copyrights, and the material, in fact, becomes the public domain. Which, in general, is great! And such materials are published obviously not for the extraction of material profit. Another thing is copyrighted materials and articles, as well as other works for which licensed purity and legal ownership of the material by the author matters.
There were precedents for the use of materials from one resource by others in the area related to the issue, but they do not have significant significance. Another thing is to issue one resource after another, as well as massively copy materials without providing a source.
In general, a separate article can and should be written on this topic. Thank you.

Answer 3

>Why can't primary source companies (say bash) write a user agreement under which only they can distribute the content that they publish?
And what about the fact that bash is not always "original"? There are reposts from habr, and from the same ibash.