I want to believe that it's justification, but looking at the historical uptime [0] (early data is actually overly positive on this graph since it had to scrape historical data instead of realtime), I can't be convinced of this anymore. They do have more load - that's for sure. I just don't believe it's an excuse for their god awful uptime.

[0] https://damrnelson.github.io/github-historical-uptime/