I honestly didn't see it until you pointed it out now.
It's so small and it's so close to the sign-in button, that I took it as part of the sign-in stuff, and trying to click on the X the first time actually clicked on the sign-in stuff instead.
I actually went looking for the X by scrolling down.
Too bad they didn't move it more to the right away from the sign-in link, and made it a bold font like they did the wording right below it, as it seems like such a small unbolded font that have the X be displayed as.
I'm not going to change my original comment, and I still stand by it. If they obfuscate the way of closing the pop-ups by making the close button so small and insignificant compared to the other likewise texting around it, to me that still paywalling, as they're trying to trick people into signing up for an account to read the article.
It's a smaller font size and non-bolded right next to other text around it that's larger font size. Oh and it's also pushed up next to another thing that does the complete opposite, instead of observing proper spacing between UI interaction items; bad UX.
Yeah but it's obfuscated by being a smaller size crammed up next to something else that's a larger size, and right above in the same area as other things that are in a larger font size.
It is not at the normal absolute upper right hand corner of a dialogue like the close button is on normal dialogues, and we both know that.