It will disappear just as fast as it arrived. Maybe one will survive. Just like Sprig, Spoonrocket, Maple, Eatclub, etc and the legion of instant food delivery services came and went, this too will pass.
The LA beach cities seem a good environment for them. I'm skeptical how successful they'll be more broadly especially to the degree cities get more aggressive about keeping riders off sidewalks. It's not a big problem in less crowded areas and a relatively small number of users but it's a problem with more riders and more crowded areas.