Pretty much half the income for EA is from Fifa, and most of that is FUT. I would need to dig in my old posts to get the exact quote, but they said in an investor's meeting that Fifa makes more than half of the digital income of EA.
In other words, EA is earning way more through FUT than they do through game sales.
Found most recent article that gives a number I can find, nov 2018: "Revenue from Ultimate Team is quite large, making up 50% of live services or $1.1 billion over the last year. That's 21% of EA's total revenue."
It'd put FUT and game sales at about 50/50. Probably slightly in favour of FUT.