I had a weird experience.
I had 25 BPs of CDM after someone's level up to 32 (1), and after he leveled it to 35 and 36 I got rewards of BP, 4 each. But when I counted it was only 30 in total (2).
Have been contacting support but all they say is clear the cashe, log in again, the server says you have only 30 - all those rubbish again. Do they really want to support the users???