I haven't split it, that wasn't what was critically important to me. I just looked at who was loading funds. Besides, there isn't a way for someone to split usage from publicly available info.

HOWEVER, the bot plays ranked automatically with NO FEE. So pre-loading DEC to buy BH Credits seems to represent a clear intention to use for either Brawls or Tournaments. If a person uses for one, it seems very unlikely they wouldn't use for the other if they have funds loaded anyways.