I think for most people there probably is not a hard limit. Perhaps for some people, and some N, it becomes harder to add the (N+1)th service over the Nth. I'm

I think for most people there probably is not a hard limit. Perhaps for some people, and some N, it becomes harder to add the (N+1)th service over the Nth. I'm certain that averaged over all readers, the reader who subscribes to four paid news sources already is a better sales prospect than the one who doesn't subscribe to any.