Meh..
Me and some of my family have had various Christian tunes as ringtones over the years. Much easier to do these days, since you can just bung an MP3 or similar on most modern phones using a data cable. But we did make some of the old style beepy ones back in the day.
I can't see them making a fortune off this given the smallish market, but I would think they aren't aiming to do that anyway.