Ann: Notification of 2019 Annual General Meeting Date, page-35

"As for BOOM, it's primarily been 'talk' about their software, we haven't actually seen a workable solution or finished product of any kind. We've only ever used their PP services."

That might just be the most valuable piece of factual knowledge that has appeared on this forum in nigh on 2 years. No doubt, had it been revealed sooner, the loud advocates would have said that was because they were "developing solely for CBA" or some such, but it certainly stacks up. Now that would be an interesting point to raise at the AGM.....