The thing is, money is not in short supply, access to gear is. So how did they get access? Is the question.

Edit: I missed the answer due to not being able to read the full article, I withdraw the question, unfortunately, I cannot delete it.

Here's the answer to that question, from the second paragraph of the linked article:

> Facebook officials said they bought the masks for their offices’ emergency disaster kits following wildfires in California.

It's explained in the second paragraph in the article.