you see... the network does ultimately have to make a cost for publishing.
i think penultimately downloading content will need this too. requesting content from relays can become a DoS vector.
it was my first reaction to the whole thing in the first place "spam party"...
there is people working on ways to do this on a fully trustless basis over LN but i am betting on my own solution, which is indra, which enables paywalling for in- and out-bound traffic into the network, and uses microtransactions and tiny prepaid sessions. the side benefit of indra is privacy, so i think that since privacy helps security it has the best cost/benefit ratio.
just wish i could dedicate the time and effort to work on it, and that probably means courting investors first of all, neither of which i have as a luxury right now.