What about lock-in, being a monopoly? Why wouldn’t you maximize on saving costs? Sure some people leave, but the majority is not going anywhere. And if the platform dies they’ve made more money than to keep it alive.
Companies aren't getting cheap loans right now so they're desperate to juice their stocks so that upper management can secure their bonuses.
That's why "get shitty" is necessary.
When they've wrung it dry, pocketed all of the crumbs of raw cash they can get, then they'll either collapse due to overmilking their products or they'll realize that the only way to refatten the calf is to bring in new customers, so they'll unshittify it for the fresh infusion of customer money.
It's a cycle, and one I predict will inevitably lead to many of these companies' collapse.