Here's an example of how communication with a company like GOG, who has many passionate supporters, should have went:
Dear GOG Community,
GOG has been the target of many fraudulent credit card transactions. As an immediate stopgap, we have halted gifting from the most heavily-stolen games. They are listed here.
We know that you guys love to gift games to your friends and hold cheerful giveaways that really give this site a friendly atmosphere, so we are working diligently on a fraud protection scheme. We'll be discussing the most robust, but also non-intrusive, ways of combatting this. Once we have decided what we'll be doing about it, we'll get to work on implementing it.
We hope we can get something in place in the next 6-12 weeks. Please bear with us while we make the site safer for you.
As a reminder: Nobody sells GOG keys. If you purchase a GOG key from another distributor, you may or may not lose that game if it was purchased with a stolen credit card. Unfortunately, we do not have a system in place to alert you if your game is stolen nor is it priority to make that system at this time. We will be focusing on stopping the fraud, not alerting those who have purchased fraudulently purchased games.
As always, it's an honor to have such devoted and kind customers such as yourself.
Sincerely,
Your Friendly Neighborhood GOG Team