This also makes more profitable for everyone to hold their BTCD and KMD even if it dropped 50% after launch.
Actually, a 50% bonus covers only a drop by the third of the ICO price i.e. 33.33%. Let's assume for example that the ICO price was 1BTC = 10KMD, with a 50% bonus, that is 1BTC = 15KMD, so you get 15 for the price of 10, price-wise you paid 10/15 = 2/3 = 66,66% of the (no-bonus) ICO price.