It might not look like your usual company's advertising or marketing, but it's there.
Their Youtube channel[1] is full of it. Watch this[2] and tell me that's not an ad. It's a perfect example of an advertisement.
They might not have a department that is called a PR department, but they do PR.
[1] https://www.youtube.com/channel/UC5WjFrtBdufl6CZojX3D8dQ