The real problem here is the difficulty these startup mask manufacturers have with securing bulk orders. Those lucrative deals are often, it seems, prevented by preferences for existing models, restrictions on models, and sheer institutional conservatism about trying something new.
Another issue is the difficulty legitimate manufacturers have listing their articles on search engines and online retailers, which often still restrict mask listings due to concerns about fraud or price gouging.
Also, the website of one of the companies has a website that is down on day article was posted.[2] Not clear if that is due to the coverage from NYT, or other operational problems.
[1] https://www.unitedstatesmask.com/products/1836-n95-particula...