"Donald Trump as an endorser of the company has previously been endorsed."  What?  Sorry, but this sentence doesn't parse.  Aside from that, you seem to be leaning towards the notion that an endorser of something must be unpaid.  Check Wiktionary, and you will see no implication that endorsement requires this.  It is a commonplace that if some celebrity endorses something, beaucoups bucks was spent to achieve this.  Is the news that Catherine Zeta-Jones endorses T-Mobile something that cannot be noted on Wikipedia because it is POV?  It is a fact that she did, and they paid her well  otherwise why the heck would she do it?  If I were to write in T-Mobile's WP article, however, that "T-Mobile is such a great cell phone company that even the great actress Catherine Zeta-Jones likes it", that would be clearly POV, and she didn't say that, either, she simply read the ad copy they gave her.  By the same token, the news that Trump endorsed ACN is not POV, but a fact.  Presumably they paid him something, but maybe they didn't, there is no publicly available information on this that I am aware of, so saying he's a "paid spokesman" is a speculation and violates WP:VERIFY  I do happen to know that there is a contract of some kind covering ACN's use of his image and so on, but that's not verifiable, so its not in the article.  I tend to think that Trump doesn't need celebrity endorsement contracts to support his lifestyle, but whatever.  As far as WP:VERIFY is concerned, the reference at the end of the paragraph attempted to cover the whole paragraph.  Do I need to add the reference to every sentence or assertion in the paragraph?  There is such a thing as over-referencing things, too. No, I think the paragraph should stay.   
 : Sorry, a typo.  This was a topic of discussion - see the talk page archive.  Calling him an endorser without revealing that his is paid can be misinterpreted. Being paid is akin to being a paid spokesman.  There is a completely different implication if one is paid to be on a commercial versus giving an endorsement without pay. —