It depends what you're targeting. Retaining your existing customers is equally as important as growing your business. Passenger numbers are still in decline, so you can't knock companies for trying new things.
With those using ENCTS passes, it's simply a case of first bus that comes along. On competed routes, it's clearly about price and then frequency, above anything else. But what's to stop fare paying customers to choose the car instead?
I personally couldn't care less how eye catching they think a multi coloured bus is, as I'd rather just have a comfortable seat and WiFi. I'll get the former in a car, but WiFi is a selling point for me to use the bus over the car.