You can block all cookies on the website if you want a paywall bypass that works without needing incognito - an extension like uMatrix [1] does this persistently (click on the plugin icon when your browser is navigated to The Economist, then click on the bottom half of the "cookie" box in the "all" row. The column should turn red, indicating that cookies are blocked).
[1] https://github.com/gorhill/uMatrix