Good catch, I’ll add some kind of wording like “Count the cards in your Guild Standing. Use that number to determine your final score from the scoring chart.“ instead to indicate the count (not values) represent your final Guild Standing.
Yes, those that match all count as $0 as a restriction you have to play around (blame management and their crazy promotions!). So they’re really only worth it to trade if they’ll give you Guild Standing (and even then it may not be).