Here's the dirty little secret, which ironically I shouldn't need since I actually subscribe to the Sunday dead tree version.
They put cookies on your computer and you get one, maybe two bites of the free article apple before you are blocked. If you're trying to read more than that, you really should do an online subscription (they're on sale all the time).
So .... if they block you, erase your cookies and the free clock starts again.
There used to be a way to use Google search to get into WSJ articles for free but they plugged that hole in their firewall.
And the article starts with the Points Guy but strays far, far away into the history of frequent flyer programs and the corresponding efforts to game them (e.g., manufactured spend). There are entire websites devoted to this.
Speaking of cookies, there's a longstanding internet rumor that when you visit a travel site like E---dia, they put a cookie on your computer. If you go away and come back, that fantastic fare that caught your eye that no one else could match ... will never reappear. The reasoning being, they know you're hooked so they don't have to be nice anymore.