Also important to note, that Uber does a few things exceptionally well that most other "Uber for X" companies fail with at least one or more:
1) Dramatically increase convenience / quality of service
2) Lower or comparable costs to alternative (esp UberX vs Taxi and vs your own car)
3) Have a demo-able product. Viral word of mouth is so simple when you can literally take your friend for a ride.
Most other on-demand services fail at one of these. Spoon rocket in your example, first started as a more expensive convenience play, then as they tried to scale up, lowered quality (violating #1) in order to compete on price (#2). This is why I stopped using them and also why I don't use their competitors like Sprig and Munchery, just too expensive for what it is.