I think we can agree that what you do and what your salary "come from" can be distinct and can be influenced by other things. There are engineers at FB whose sole job is maintaining REACT.js but they are paid from the money made from selling data.

Further, and I want to make it clear that I don't mean this as a value statement, but is a printing company what most of us really think of a the "tech" industry? and by extension does that really make you the subject of what you are replying to?