Articles appear free on The Ultimate History Project for the first two months after they are published; after two months, the articles disappear behind a paywall.  Articles behind a paywall can be accessed via a subscription.

The Ultimate History Project intentionally keeps subscription prices low ($25 for a year-long subscription) to enable and ensure that high school teachers and students can read and access these articles.  You can buy a subscription to The Ultimate History Project for less than an old-fashioned cup of joe per month---and it's a lot less than a latte a month at Starbucks.  Better yet, a subscription gives you something to read while you are enjoying that cup of joe. 

Revenue from paywall articles is shared among authors, with a small proportion of these fees being used to maintain The Ultimate History Project.