A number of sites' paywalls can be bypassed by modifying your referrer, with an extension like Referer Control [0] for example. If we take WSJ, I entered their root URL as a site filter, and set a custom referrer (in this case 'https://www.google.com'). This works for many news sites [1], but LinkedIn for example seems to ignore this.
[0] Chrome: https://chrome.google.com/webstore/detail/referer-control/hn...
[0] Firefox: https://addons.mozilla.org/en-US/firefox/addon/referrer-cont...