Buy one get one 50% off but the usual free shipping on orders over $75 doesn't apply. So, it's actually buy one get one ~20% off because now you have to pay for shipping.

Also, if you add a cheaper third item to the cart to reach the $125 threshhold for non-code shipping, the BOGO coupon reapplies itself to the much cheaper item in your cart giving you an even worse "deal".

It's very scummy to obfuscate the actual benefit of the sale this way through loopholes and automate the cart to give customers the worst deal possible.