Kucoin has twitter polls where community decides which coin is going to be listed there. Last month there was a poll in which DeepOnion won and got listed there. As I'm not that active on Twitter anymore, somebody should check what is situation now. If there is a chance to get listed that way, we should consider to gather whole community and vote.
Personnaly, I think Cryptopia is better..
Is it so hard to be listed here ? So many new coins get Cryptopia as first exchange
It's not that hard I would guess.
https://www.cryptopia.co.nz/Paytopia as you can see, devs can buy to get listed there, but for Shiled that might be problem because there wasn't any ICO od premine coins. Everything will be based on donations probably. Anyway we should wait till some future developments are made, according to roadmap.