The majority of businesses are cited for "sponsoring" Celebrity Apprentice, which I assume means they bought ads to run during the show. The show was cancelled so boycotting them is pointless. It's not like the businesses can stop running ads on Trump's show in response to being boycotted. (Side note: I couldn't read the entire info on these businesses because the text was too large and the app wouldn't allow me to scroll)
The next most frequent type of "Trump support" was stores that sold books, clothing or other merchandise that has the "Trump" name (Donald or Ivanka Trump merchandise). I'm not going to boycott a bookstore for selling a book written by Trump --that seems un-american. As for stores that sell Ivanka Trump fashion line merchandise, I dunno. I certainly would never buy her stuff, but to boycott a store carrying her merchandise seems like a round about way to protest Trump ...although since she is one of his "advisors", boycotting her stuff might be worth it.
Last and definitely least, there are a few (very few) businesses that are cited for directly endorsing and funding Trump's campaign. Those I will boycott. But by listing all these other businesses, this app kinda hides the prime supporters of Trump.