I consider startsts's cryptohub.online as the defacto standard for buying/selling CrocodileCash. I could care less about Yobit.
Eventually, CrocodileCash will have a dedicated exchange for itself (hopefully startsts will be onboard for this), in order to make it easy to buy/sell CROC, and very noob friendly.
Agreed on Cryptohub being more trustworthy than Yobit's track-record has seemed to be. startsts seems to be very responsive/active to feedback too. However, the exchange will be well off-the-radar for most so long as it's not incorporated into coinmarketcap's site. CrocCash has a block explorer, two exchange markets, but I think it needs a website to be recognized by CMC.
I question whether a dedicated exchange will be necessary -- with the trading range being between 420 and sub-100 sats in the past week
the market cap is no higher than:
2,407,834 CROCs * .0000042 * $4416 US =
US$44,658 (using the # of CROC extant, BTC price, and the highest daily price at the time of writing). It's still early days for the people who lucked into this (and are going to hold a portion instead of trading it all for BTC or something else) at this point.
I've only been about a year and a few mos into cryptos (and only into the alts since about late-May), but
I don't think there are a lot of exchanges that are focused on just one coin. It wouldn't seem to make sense for an exchange to do so either -- there doesn't have to be one or two dominant coins with a dedicated/
ad-hoc infrastructure (there can be quite a few coins with all their variant characteristics while there is a "rising tide that lifts all [or most] boats").