The contest is over! Congratulations to the winners--excellent work all around. None of my submissions won, but with such amazing competition, I would've been surprised at even an honorable mention. Again, nice job everyone that submitted something.
There are lots of jokes and artwork like this one, drawing attention at how the others are making a huge deal out of losing their 'extras'. Ranging from hurt, confused, or amused like this one.
I still think there is more to that. Earth pony gifts are much more subtle in their nature than those of a pegasus or unicorn... I mean, flight! Spellcasting with a thought! What do they have? Well, Earth ponies have a LOT of strength, for starters.
I bet that Discord DID take away their abilities as well, but since AJ and Pinkie are already very energetic and strong from all of their activity, there wouldn't be any noticeable difference for the most part, but either pushing themselves to the limit or the long run would reveal that there were changes.
Of course, the 'game' ended pretty soon, before any situations that could reveal their losses happened.
For those who are unable to translate basic Interweb speak, allow me to function as beetwicks interpreter.
"It comes as both an unpleasant shock and mild outrage to see no other form of critic or appreciation for this stupendous example of equine artistry. The humor to be found in the Earth ponies easy dismissal of any perceived inconvenience found in lacking either magic or flight provided no end to the terrific sounded of delight and approval the imagery herein provided."
This is, of course, a rough translation. It takes many more years then I've committed to this language to become truly fluent.