Some languages tend to be more strict about this. I think it's particularly common to see English play fast and loose with the language compared to other languages.
In Sweden, for example you will see media write Iphone, because it's a name, and names are capitalised.
The same goes for Digital Ocean, or Digitalocean if you prefer. It can definitely be argued fairly that the writer does not have to break language conventions just because a company says they have to.
