It says "it may" - it's also Wikipedia, written by random people on the internet.
But please read my link on implied licences.
You might find this link on of more interest:
"Any infringement action must be brought within three years after the infringement occurs. {FN82: 17 U.S.C. §507(b)} But in many instances, the infringement is of a continuing nature, such as distributing copies or performing the work. For example, consider the making of a large number of infringing copies and distributing them until all the copies have been sold. If it is over three years since the copies were made, the copyright owner can’t sue for infringement of the reproduction right but can sue for infringement of the distribution right if any copies were sold within the previous three years.
However, if the copyright owner acts in such a way as to lead people to believe that he or she will not bring an infringement suit, such as ignoring open infringement for a long time, with no other reason preventing him from bringing suit, a legal principle called “laches” may prevent a later suit. The determination is very fact-intensive, based on the actions (or lack of action) of the copyright owner, the amount of delay, and the prejudice worked against the infringer by the delay."
Thus if Medievia were to shut down today, three years from now they would indeed be untouchable.
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