it was 50% on the BTCD price around august. so it's not comparable to the BTC bonus.
Wrong. It also gets the averaged BTC bonus % added
as-well. That includes the 'whale' bonuses of 30-35%.
Yes investing with BTCD is the the better option. By the end of the ico investing with BTCD will likely = 0.00532 (fixed rate) + 15% (just an estimate of average bonus %) = 0.006118 BTC. With other benefits on top like a Poloniex listing, revenue asset etc.