[mcintyre1994]

It might just be me, but even if Google and Facebook were happy to advertise their masks I'd assume they were fake/bad quality if they were being advertised on those platforms - in the same way that Amazon clearly are selling rubbish. Not sure what the solution to that is though.

[high_density]

maybe Google, FB, Amazon are victims of their own 'successful ML algorithms' or some sellers that are gaming the advertisement system?