Is it so unreasonable to charge 20m/year to a super popular iOS app? I don't know.
Does apollo make money from this? Do they take advertisement income? But I imagine, if you are the most popular app, on the most popular mobile platform, of a very popular site like Reddit, there has to be a lot of money floating around no? They definitely have income, and definitely have expenses (development isn't free). Curious to actually see the balance of these.
But if reddit want people to use their own app, I don't see why they would support Apollo for free. I also don't know that the actual cost towards reddit would be. A reasonable price is probably somehwere between 0 and 12k.
The numbers they posted suggest they could still easily be in profit with these charges, they just wouldn’t be making 20m profit.