Railway is far from alone in doing this, but I really find it frustrating how much most hosts overcharge for bandwidth. $100/TB of egress basically kills any P2P video chat apps (even if they rely on WebRTC and only need TURN), screen-sharing, and many other classes of interesting services one could build. It's considerably more expensive than what I paid serving audio files from a WordPress site over a decade ago, despite bandwidth being much cheaper in 2023 and media files of all sorts being larger.