- Reminds reviewers to avoid libel, since it may undergo legal review.
- Tells potential employees or customers that this is how the company responds to bad press/negativity (i.e. disproportionately).
- Doesn't subject Glassdoor to potential libel since the statement is objectively true (see court records).
Although I won't get too positive about Glassdoor as I've read negative reviews disappear[0].
[0] https://www.reddit.com/r/sysadmin/comments/8tfhxv/glassdoor_...