I don't know, but I know for a fact that they made profit with UFC 191, that goes to show how low the production cost and fighter cost for the UFC actually are or rather can be - downright criminal.
If they'd pay their fighters a fair amount, I'm sure that his (the guy I quoted) number would be more accurate, it may be accurate for that event (if they expected it to do better) but as of right now they even make a (small, obviously) profit with the 115k they did with DJ vs Dodson.
But I'm guessing this is only true if they EXPECT the PPV buys to be low, for example if they thought Tony vs Lee would do good they probably spent way more on production and promotion - and if the buys are lower than expected then they probably didn't make a profit. But if they expect events to do bad (like UFC 215) they'll keep costs low and still make profit or at least break even.
But one thing we can all agree on is: PPV is dying.
Outdated model, especially in Europe and Asia. I can not fathom the amount of money UFC is missing by not putting free prelims on facebook followed by a little bit cheaper main-card on Facebook, Amazon or even Netflix and market them differently, and finally move away from this boxing business model. Because I can guarantee that pretty much no Russian (for example) is going to pay that amount of money to see a PPV. But that country should already be a huge market, especially with the amount of great fighters in the UFC that come from there.
But I'm guessing TV deals around the world are definitely the target and the future, and will benefit us (the MMA-Community) greatly.