I just thought:
Most people go on private servers cause they cant afford Retail, right?
So i just thought, if you're doing a youtube game card generator, go on as many private servers as possible and spam your gamecard video, for example a message your could say is:
/1 Are you on this server because you can't afford retail? Well, I used to be like you, until i found this video <Insert Link>. It's the only 100% working Game Card Duplicator. Why be here, when you can be playing retail for free? I PROMISE you that this program works!
Meh, your scamming people, doesnt matter if you lie about a promise, amirite?