If you're experiencing this on iOS, it's probably because of some anti-tracking "improvements" that Apple released with iOS 11. This feature unfortunately makes it so the WSJ subscriber cookie is forgotten very frequently.
I ran into this problem with an app [1] I built, which has a partnership with the WSJ and gives free guest access to their content. When iOS 11 came out, we got lots of support emails from people wondering why they had to log in with their guest pass all the time. In my experience, it happens at least once a day. Our users put up with this because we give them free access to the WSJ, but I can't imagine putting up with this as a paying customer.
I ran into this problem with an app [1] I built, which has a partnership with the WSJ and gives free guest access to their content. When iOS 11 came out, we got lots of support emails from people wondering why they had to log in with their guest pass all the time. In my experience, it happens at least once a day. Our users put up with this because we give them free access to the WSJ, but I can't imagine putting up with this as a paying customer.
1: http://www.readacrosstheaisle.com