Paywall software provider Press+ released new data today about the more than 400 publishers who use its service to charge for digital content. (Poynter uses Press+ to solicit donations.) Overall, publishers are gradually squeezing readers with higher digital subscription prices and fewer free articles per month.
Infographics (after the jump), provided by Press+, show the trends. Earlier data from the company showed that sites producing more content made more money from digital subscriptions.