> Mere awareness of a transaction is too much friction when you're talking about fractions of a cent. Counting half-pennies is just not worth my time (ironically, half a penny is in the same ballpark of current advertising rates).

Couldn't this be solved with some kind of automation? It would take some standardization but what if clicking the ubiquitous "like" button on a piece of content sent a configurable amount of btc to the content creator?