I would ask what the poster there gains from writing the article.
Is he invested in other currencies, websites?
What does he gain from warning others? Is he altruistic?

Steem exists, it's here, and it's thriving. No matter what anyone says.
All cryptocurrencies and implementations are considered a scam by someone, he's posting rumour, possibly twisting facts etc. It's an interesting read but just because someone says it doesn't make it true.