Earned? You mean buying 3oc coins from "xur" so rng is now earning? The only difference is instead of someone wasting their time with 3oc they bought a 280 supercell. The only exotics you can "earn" are the exotic quest ones. You didn't earn your supercell you just killed an ultra, (which anyone can do with a 3oc active) and got lucky with your supercell. I've had my supercell since week1 and tbh it's not worth the exotic slot most of the time. Only on arc burns or a bunch of red bar enemies