10 Doge is around 3cent, I mean you could at least give new sign-ups something that is worth $1-$5 USD. There really isn't an incentive to sign-up for the exchange, and when you launch the ATX token, it will probably be less than what DOGE is now.
I don't understand how are you adding other coins but not your own, yet?
After making good community of Altcoin Exchanger, we will launch ATX. Currently All member can earn many free coin from our faucet.