You might not have been aware of this when the Washington Post paywall went up back in June, but there is no paywall if you have a .edu/.mil/.gov email address. Go here to obtain your free access. From the website:
By registering with a valid .gov/.mil/.edu email address, you will get free, unlimited digital access to washingtonpost.com whether you are at work, at home or on your mobile device.
Not sure what this means for their business model, but I’m certainly appreciative because the proliferation of paywalls meant limited the number of publications most of us could afford. I’m not sure if there are other sites that have a similar set-up, but I noticed that the Monkey Cage agreement with the Washington Post also had this built in.