You're welcome to continue purchasing from them. However, I prefer to purchase games from other publishers.
There have been tons of component issues in various games (it just happens and is part of the business), and many publishers (e.g. Rio Grande, Mayfair, Fantasy Flight) deal with them by replacing the components. ZMan has chosen to not replace them. That's a business decision. I can understand that. It's just a decision that persuades me to pass on their future games.
The reason may be that the cards do not break the game and you have two easy options:
1. Print them off and if you want paste them or use card sleeves. Except for one card the corrections are minor anyway so you can use a pen to correct them.
2. Take them out of the pack. There's hundreds of cards so that wont make any real difference. A lot of players cull the deck for over or under powered cards anyway.