I own a small business and we ship all our packages through USPS. We spend about $1,000 in USPS shipments every month. We have been using Chase Biz Ink for all these charges and I am wondering if there is a better card to use for points? What's the best card to use for points when charging at USPS? Would Amex Biz Gold be a better option? Chase Freedom? Thank you in advance for any suggestions!