Pirate Ship offers USPS rates up to 87% off, making it a solid choice if you...

https://wiki-neon.win/index.php/Why_Doesn%E2%80%99t_Pirate_Ship_Offer_a_New_User_Bonus_or_Shipping_Credit%3F

Pirate Ship offers USPS rates up to 87% off, making it a solid choice if you mostly ship domestically with USPS. Support is email-only, which might slow things down during busy times