It has been blocked by the GFW a few times. I guess having it go down like that unpredictably would push people towards coding.net? But the l10n is probably a much bigger factor for why anyone would use coding.net?
Also, CODING runs a marketplace (https://mart.coding.net) to help developers find matching software requirements and make the deal. We will be rolling out the English version of our site in this year, so stay tuned:)