Think about it - who would go out of their way to download a un-official app?
Edit: and certainly nowhere near enough to offset that kind of price increase.
Other apps are around that ballpark, and that's every before considering that Apollo users tend to be heavily power users. Over 7000 moderators of 20k+ users subs for starters, means a lot of requests.
I'm not a reddit admin. Please try to engage in good faith on this website. I'd suggest reading the "In Comments" section of the hacker news guidelines if you're unsure.