I think craigslist survives _despite_ its ugly UI just because of market lock-in/inertia.
the ui is awful from a utility/ux, pov - it’s limited and hard to shop/browse with.
Definitely - there used to be a bunch of sites that scraped craigslist and put their listings into more browse-able formats (e.g. Padmapper), but once they got too popular, CL started sending C&Ds and filing lawsuits.
