$250m of revenue from not fortnite, 12% of that goes to Epic so around $30m revenue from actual real games. when they had to pay for exlusivity deals on borderlands 3, red dead, metro, outer worlds, control, the division, anno, world war Z and a shitload of other smaller games, had weekly free giveaways that they had to pay for and had a universal $10 discount multiple occasions which would've also had to have been compensated, i reckon it's cost timmy a fair chunk of fortnite change just to make a store much shitter than steam and inversely profitable.
can't imagine those publishers being happy with the sales either given that $250m is a combined 4 million sales at $60. borderlands 2 did that on its own in a week.