Given how much revenue depends on the experience of a web app and loading times, I’d be happy to pay 100$ a month on that revenue if I don’t have to sacrifice a second of additional loading time no matter how clever I was optimizing it.
$100 is peanuts to most businesses, of course. But even so, I'd rather spend it on fixing an actual bottleneck.
For example: Ticketmaster makes a ton of money and their site is complete dogshit.