It's to point out how comparatively small X is. It's in the same ballpark as Pinterest and Quora.
Github decided not to use email (which every Github customer has), their sites, or their otherwise active BlueSky.
Github decided not to use email (which every Github customer has), their sites, or their otherwise active BlueSky.
There are plenty of reasons not to use X, but that's not what's in contention. X.com was the _only_ platform they shared this information on.
It bears repeating: Github decided not to use email, which every GitHub customer has, and Github chose not to use their sites, and GitHub chose not to use their otherwise active BlueSky.