Arcadia Power

Arcadia Power doesn't sell actual power but handles your power bills and reinvests in green energy certificates (or something in that nature). What's important here is that it is free (there's a paid subscription as well if you want to invest in renewable energy). Even with the free service, you get $20 off your power bill. In short, Arcadia Power handles your bill payment and get $20 off, and all for free.

Besides, you get a nice dashboard and access to exclusive discounts from select green companies. Not bad. It's like earning $20 in 5 minutes.