Wow, you weren't kidding. That's literally more than 10 times what I paid for the original Sync for Reddit Pro (standalone, without the ad- and tracking framework).
That's "I want to technically offer a one-time-payment option, but don't want people to actually use it"-pricing, especially since it doesn't come with any of the additional subscription features.
I just went from "cool, this will probably be my new home" to "I can't wait to see what Boost has to offer".
As someone who bought the premium version of pretty much every single 3rd Party Reddit client (and just about every app I use that allows for ad-removal), this might be the first one I'll skip.