Well, you don't know how it works but you're sure it's a scam and ridiculous? I would suggest informing yourself about the basics of energy markets first befor

Well, you don't know how it works but you're sure it's a scam and ridiculous? I would suggest informing yourself about the basics of energy markets first before making such definitive statements. Obviously the electrons you get might come from anywhere, but EON is buying energy to feed into the system to match the demand of it's customers. If they buy enough renewable to cover their demand than it's fair to say that they switched their consumers to renewables, even if the specific energy might end up elsewhere. Here is a good way to think about it: What would it take for every energy supplier to offer 100% renewables? If that is only possible by running the system completely renewable, then the certificates are not lying. Of course there is a displacement effect: If EON runs 100% renewable, and in return a larger supplier runs 10% renewable instead of 30% and doesn't tell their consumers, nothing is won. But if consumers start demanding or favouring renewables, then this latter supplier will also have an incentive to increase renewables in their system.