i have done some side work with one of the exchanges before, and i will tell you they are getting slammed with requests in general from the many cryptos/icos.
from what i have seen they take a interest in coins that will have a decent market and have decent support.
Only take each of you 10 mins max. Couple things to help: " If you guys really are strong on the success of Credence, take the few mins and help "
1.)
https://www.yobit.net/en/addcoin/ -request coin add
2.)
https://twitter.com/YobitExchange -send them a tweet @yobitexchange
3.)
https://twitter.com/CoinExchangeio -send them a tweet @CoinExchangeio
Post on your twitter about credence, make a youtube video, tell your dog, your cat & gold fish
I will be making more vids of credence over the next couple days:
https://www.youtube.com/channel/UCseFeyC9u_RLnyoNzQYv34w Crypto Kong will most likely be doing another video
https://www.youtube.com/channel/UCR7XuKH4TKU5FUvvQFx89KwOnce credence has the site/platform running, its a whole different story. My advice is : Buy/Hold/Stake