>>/72336/
I wonder.
PriConne did give enough out that after a while I was swimming in jewels so I could spark a character and still have some left over, but they would sometimes drop like 3 or 4 limited banners in a roll, and of course they all just powercrept the entire roster up to that point, so I still just ended up saving them for the seasonal characters. In DereSute you legit had to save for like half a year to get a spark if you were f2p. 
I assume you mean dollars and not yen.