As the author posted the article and the error is consistently made within the posted article:
Language changes. The subjunctive is practically dead, long since merged with the indicative and therefore only inferred from context. You had no trouble reading this article with the author using the 'wrong' its/it's.
Things aren't changing in the future. They're changing now.
I challenge you to compose a sentence, in context like this blog post, that is confusing to a native speaker with its/it's collapsed.