BushTripInjector is free for your personal use, but not for us. Maintaining and improving software not only costs a lot of time, but money as well. For example, there are hardware and software costs, telecommunication costs and more. This project is not backed by a company, so there is no fixed funding and every minute we spend on it is taken from our spare time.
If BushTripInjector proves to be useful to you, we would be very glad to receive some appreciation in return.