Could the OP please be updated to include the additional block explorer and exchange information?
How much does it cost to buy a listing on Bittrex?
You are right, I'm going to update the OP in a few. Thank you for making me point out and apologize for the delay.
About Bittrex: the policy to be listed there is changed. It is no longer enough pay, but (from a mail that I receipt from Ryan)...
"
we only add coins under active development with high community demand. We gauge demand based off of tweets, hash power, length of bitcointalk thread, volume on other exchanges, etc. Follow us on twitter @bittrexexchange and tweet about how much you like this coin and Bittrex. We respond to creative and insightful posts to help market your favorite coins and Bittrex. I'd also consider coming to our irc channel #bittrex on irc.freenode.net and do some guerrilla marketing. The traders there can help you gain exposure for your coin."
It means that Cre needs a exchange like cryptopia or cex to make trading volume.