That's the study comparing surgical masks to rarely washed, rarely-changed cloth masks for health-care workers to prevent infection to them! In other words, duh. Author of that study recommends cloth masks for community for source-control: preventing transmission outwards.
The number of experts who cannot read that study, continue to think it's evidence against cloth masks for source control, and don't even bother to look up what the lead author says for this pandemic.. Mind-blowing and disappointing, to be honest.