I also suspect that there were inconsistencies between pricing based on the 3rd party app in question. I don't mean that Apollo was being charged more (in proportion) for having a larger userbase compared to apps like Relay or narwhal, but that Apollo was being charged almost double per unit to access API than Relay or narwhal. I am reading between the lines of articles published two *weeks ago about this because it didn't make sense to me why these smaller apps would be able to afford the business model if Apollo had a $20M bill to pay in August.
What gets my goat is why didn't reddit ever just headhunt Christian or other 3PA developers and bring them into reddit corporate to build out their native app? That's what Google or Microsoft would have done to quash competition. Or, to be truly evil, hired Christian and then never let him work on apps again with both an NDA and a non-compete in place.
Huffman regularly calls reddit unprofitable with a heavy dose of ire, but I think there could have been a way to bring a reputable 3PA dev into the fold to keep the reddit native app at least comparable in UX.