if I had to guess, what hapened on c-cex had something to do with XCP hacker or the poloniex owner destroying competition bc he was attacked before with this bug and therefore familiar with it, steal from competition and launder your money in your exchange.
The prior hack of Poliniex was only in the early moments thought to be of the exchange fault, but it was actually based on a problem on the CounterParty code itself.
Here is the official thread discussing CounterParty protocol, client and coin and whatever else can be relevant on the subject; Thread that I was in and reading as the discussions were moving from subject to subject, and while there were discussions on the table on how formulate a safety net by using some underwriting and the issues of trusting Poloniex as the 'de facto' main centralized exchange for XCP and the risks in case of them or other future centralized exchanges defaulting in bankruptcy, or the safeguard for the like of a crash in the XCP prices.... one person posted about big dumps of XPC on the actual Poloniex exchange.
https://bitcointalksearch.org/topic/m.5237047At first was even thought to be a typing mistake by a "fat finger" trader.
Here, ironically before the event happened, another person was hoping for a panic XCP sell for an old bug in the code, so he could enter the market cheap:
https://bitcointalk.org/index.php?topic=395761.3540This link above make for a very interesting read, that you should all partake, as it is ironical and very, very weird on the many coincidences.... or... are they not such?!.
And here less interesting, but still necessary for the sake of proof of my telling, it is the announce for the code fix made to resolve that security vulnerability of CounterParty code:
https://forums.counterparty.co/index.php?topic=116.msg672#msg672
