Does the rate of BBI change depending on the market value of ETH? I sent a small test amount a few days ago but since then the price of ETH has dropped so does mean I get less BBI if I purchase more today?
No its fixed , but if you buy today or till second January , you will get Bonus 15% . Then after that its like this :
Pre-sale 10% Bonus
1 ETH = 316.80 Tokens
Jan. 3, 2018 to Jan. 31, 2018
Pre-sale 5% Bonus
1 ETH = 302.40 Tokens
Feb. 1, 2018 to Feb. 28, 2018
ICO N/A Bonus
1 ETH = 288 Tokens
Mar. 1, 2018 to Mar. 31, 2018