Referring to their products as a proper noun is an old Jobs-ism that he intentionally did. I'm pretty sure it goes all the way back to the original Macintosh, that he wanted to be referred to as just "Macintosh" in all the marketing material, and his on-stage announcement.
Missing "ly" transforms two words from humdrum imperative verb/adjective pairing to action whose object is enigmatic, provocative and whose verb stands strong, without qualification.
(I attempted to write this without articles. I don't really agree with using "whose" but needed a replacement to "for which the")
It's nearly as bad as people referring to a baby as just "baby" rather than "the baby" or "your baby".