When Microsoft insinuates Game Pass is past breakeven, my guess is that the accounting is lumping in the entire business. They aren't including 1st party dev cost which is a huge portion of the expense. They attribute additional software sales to Game Pass so its fuzzy math. In actuality, if it was that easy to be profitable, others would be as aggressive.
What I believe (with no hard evidence) is that investment in Game Pass (including 3rd party deals and 1st party investment) will far outpace Game Pass revenue for a few years. You can hide the real cost of Game Pass on the balance sheet. Netflix was losing money and still had an insane market cap. These types of businesses opportunities are long plays. There's a tipping point. Is that tipping point 30 million users? 50 million? 80 million? Who knows. Regardless Game Pass is in it's infancy. No point in reading too much into the financials. Fact that Microsoft is kicking the tires of WB tells me that the early results are either on schedule or ahead of schedule.