Could it be an typo in the new article?
No. It's more likely that the writer, like most normal native speakers, is not too concerned about speaking/writing English in the way that the purists would have us speak/write.
As I have said before, more than once, many of your questions are about things that simply do not worry the average native speaker. Very few people speak or write in the way that grammar books suggest they do. Most of the native speakers who respond to questions in this forum are interested in language, and most of us write a fairly standard English. However, if you could hear us talking informally with our friends, you would probably be shocked at some of the 'ungrammatical' things we say - perfectly naturally and acceptably in the situations in which we find ourselves.