they're doing the usual corporate status page uptime lying:
https://i.imgur.com/vy7onDT.png https://www.githubstatus.com/uptime
https://i.imgur.com/vy7onDT.png https://www.githubstatus.com/uptime
I'm not sure how that results in 99.98% uptime on the other tab.
Number of outages and duration total are much better metrics.
didn't notice there was a selector for which type of downtime on that page that didn't default to all.