To show their legitimacy, just wanted to let you all know, I got a package from Germany today, and was at first curious, and then remembered...I opted in for a free t-shirt and ExileCoin! Thanks, Bossland Wearing it (backwards to show the design. The bee is on the back of the shirt) I suppose this is sort of a "success story". In other news, to make it relevant to this section for sure...Thanks, HonorBuddy!
I can't provide you a source it was stated from HB dev team and this was used also on D3 Beta and live. BUT Blizzard uses watermarks and numbers hidden in the images you take using print screen which of course are not viable easily. It is not a wise decision to post pictures. You don't need to trust me, just google Blizzard embeds user data and there ton of articles.