I'm not even sure how the distribution is going to work... But you can find this in their website:
What is the total amount for Bitcoin Diamond (BCD)?
The total amount of BCD is 210 million. No more increase. 170 million BCD, 1BTC : 10BCD will be presented to the Bitcoin holders for the long-term Bitcoin ECOSYSTEM support. The rest 40 million will be automatically transferred into the community rewards pool as tributes and mining.
I wouldn't waste my time with these scam shitcoins anyway. I am almost sure that nothing will ever come from this shady "project".
Read this:
https://medium.com/@btcblooddiamond/bitcoin-diamond-is-a-scam-of-epic-proportions-7d7908c43c22