If you're paid to improve articles for a company, you "are very strongly discouraged from direct article editing, and should instead propose changes on the talk page of the article in question." (https://en.wikipedia.org/wiki/Wikipedia:Conflict_of_interest) They weren't following that guideline.

Making an article better isn't as big of a deal if have some conflict of interest but aren't directly paid to edit, such as voluntarily editing an article about a product you helped build - you may "make certain kinds of non-controversial edits", like reverting vandalism, correcting typos, and adding references: https://en.wikipedia.org/wiki/Wikipedia:Conflict_of_interest...