I always hear this but I'm not sure how they subsidize rides, is it just the 50% off type deals they give out? When I was a driver nearly a decade ago I would

I always hear this but I'm not sure how they subsidize rides, is it just the 50% off type deals they give out? When I was a driver nearly a decade ago I would get roughly 70% of the fare and that would be reduced if they used a coupon so it seems more like I was subsidizing the ride. I get that they'd lose a bit of their pie as well. Recently I see the price I pay on my phone and then see the fare the driver receives on theirs and it's sometimes a good chunk less than 50% of what I pay.