The Tom's Hardware post linked in the article has an estimate of how many downloads it was:
From October 29 to November 28, team Bazzite is happy to share that the site had 730,000 unique visitors, and it served 1PB of data during a month, for the first time. How many Bazzite OS downloads does this imply? We looked at the various ISO installers on offer and noted that an Nvidia GPU friendly ISO was 7.5GB, and an AMD GPU-ready ISO 6.6GB. So, if we assume an average of 7.0GB per ISO, that would be about 143,000 Bazzite downloads – getting close to 150,000 new users, as a best-case scenario.