No, but then this isn't copying an article. Rather this is an author publishing their article on two separate sites. Given the transience of some other sites it is quite possible that blogs.perl.org will go the way of use.perl.org at some point. By publishing in the Monastery the chances of the content being lost* over time are diminished.

* Yes there is the wayback machine but does anyone browse that for old use.perl.org articles these days?