With Magic 2015 the effect was changed to having the creatures you tap work as a way to pay for its regular cost
theres also a host of artifact creatures worth copying, from the humble Construct to the ridiculous Kappa Cannoneer
Its slick, easy to download, easy to play, and you can actually do a fairly good job of being competitive without spending any money
You can run a successful sellers username through the eBay competitor research tool, which shows their revenue, sell-through, and best-selling products, so you can stock toward proven demand
Atraxa decks just became 200 card monstrosities
And in a world without a functioning economy, everything is priceless