We in the US and elsewhere have had the habit, for perhaps too long, of
assuming that conversation can be bottled up inside a piece of
thingliness - a vessel like a book, a CD, DVD, digital file, painting,
etc. -- and presented as a self-sufficient, closed object which can
then be sold. I don't think that's what "markets are conversations" was
intended to mean, but the closing of the conversation, like the enclosure of the commons, leads to improper notions of something as "a property," and then, "intellectual property."
Stalin had Mandelstam tortured and shot for an aphorism, "Crag-dweller of the Kremlin." The image was so good the poet recited it to friends, and it spread to an informant, then passes down to us, immortal though the poet died miserably. Now, that Russia has become a market economy, I am sure Mandelstam's heir's intellectual property rights are protected. In that way, I guess, the poet is well compensated.
