The publication is from 02/18/20 (as stated in the footer). Why didn’t gain it more traction?
It did. Since then they've done more studies, have started even more studies, and have deployed it en masse as a treatment. It's part of the official treatment recommendations in China, South Korea, Poland, and Italy. It's been described as a "cure" where it was used in Australia after Chinese patients demanded they be treated with it, and Australia is starting a nationwide trial. Pakistan had Bayer start up the closed production line and deliver 300,000 doses.