I disagree. Within the last week Cardano has gone from relatively unknown to the 6th highest market cap on https://coinmarketcap.com. There is certainly enough of a surge in interest to make this a relevant post.
I'm pretty sure the fact that the "article" links to both Coinbase and Binance with referral IDs classifies this as advertising.
I wouldn't mind if the link was replaced with one that didn't include "buy now" links, but the topic of "What is Cardano?" is perfectly fine for this board.
Oh I didn't even notice those were links. That puts a very different spin on the article...