I agree stevespray, with B O M taking an end of day price and B 4 T expiring the bet exactly X days after you place it to the second this can prove troublesome.
White labels inevitably don't work as those that want to are already betting with the parent company and with Betbrokers having a limited number of clients who bet on sports according to their investor relations I don't see where the profitability in this scheme will come from for either party...