Right. It's possible if they have signed a pledge, they might be using BH for tournaments but not brawls, if that matters to you. The publicly available data is limited to who is loading funds, but not where they are spending them.
I think as a community we need to decide if there really should be rules, and really outline that clearly, before we can even start to think about penalties or enforcement. There is a lot of division and a lack of clarity at this point.