The rest of the content I can understand. But the set reviews are in a weird spot in terms of content. They're usually 'best guess' type articles that deal with impressions and speculation over experience. So their actual usefulness tends to be questionable for anyone committed enough that they'd seriously consider paying for that content. For newer/casual players, I think even basic speculation is useful. But those tend not to be players who'd pay $10 to access that content.

And honestly, the actual quality of it is up in the air as well. It's a number review and a couple sentences to explain for every card. You can certainly learn about the cards. But something like Limited Resources is a much more useful tool for that.

Which comes to the biggest part. In this particular case, there's a lot of free alternatives available. A lot of players, including some good ones, want to give their opinion on the cards. Hell, even I've done a set review (and they are, admittedly, a good chunk of work). Albeit one that I only shared with a few friends. But it's content that you can find alternatives for that don't actually charge you anything.