Why is Github talking about number of commits here, and not pushes? Are there a lot of tools/people using github as an online editing platform?
Bigger numbers sound more impressive.
"Our billion-dollar infrastructure crumbles under a tremendous flood of 50 PRs per second" would just sound embarrassing.
I'm not following your line of questioning. Without ever using github as an online editing platform, you can do one push with two new commits.
GH processes at the commit level for things (including actions) even though they're bundled in a push... it's relevant to the load on their infrastructure.