Following Kieta's idea (quoted below), anyone with Codes to spare is welcome to post them here. Anyone redeeming them should follow the rules, or end the game for everybody.
The last attempt didn't go as well as hoped. This one will be different, right?
I've seen firsthand that genuine altruism exists in some players, which is why I like taking part in these things. Paying it forward, if you will. A couple weeks ago, a very kindhearted guy (I'm not sure if he wants the attention, so I won't call him out) -- someone I had traded with months before -- sent me a private trade out of the blue, with a free Ultra Ball. No strings, just a basic Energy card for it. With him in mind, I'll post a few Codes to see how it goes.
One of my favorite giveaways to do on various platforms, is something I call a Code Streak. It's a randomly paced code giveaway in which I continue to post new codes so long as the person who redeemed it posts what kind of pack they received.
All it takes is one wrong answer for me to close the Code Streak. It's completely based on human nature. If the person who redeems a code wants me to keep posting codes, they need to tell me what they got. But if the person who redeems a code either doesn't want me to continue posting codes, ruining the game for everyone else, or doesn't want to be seen participating, then it's over.