Pirate Ship offers great USPS discounts, sometimes up to 87% off, making it...

https://www.bookmarking-online.win/pirate-ship-offers-usps-shipping-discounts-up-to-87-off-and-a-simple

Pirate Ship offers great USPS discounts, sometimes up to 87% off, making it perfect if you mainly ship with USPS. Their support is email-only, which works if you don’t need quick responses