I’m more shocked that the developer of a “skill” that says the holy Mary makes $2 a month and has 10,000 users. That’s a sweet return for work that on the scale of copy-pasting the Alexa getting started tutorial.
Some of the most profitable early apps on the apps stores were Bible apps. People love their religions and will happily spend money on following them.
iirc, it all started with DarkSky, which was very reasonable, something like £1 a year, which made subscriptions for more "basic" apps acceptable, and from there its just got worse.