Looking at that page, it's also marketed as a fully turn-key solution with really everything (design, track construction, vehicles, signalling) provided by Bögl

Looking at that page, it's also marketed as a fully turn-key solution with really everything (design, track construction, vehicles, signalling) provided by Bögl, so they presumably also hope to get some sort of lock-in effect where buyers of their system continue being dependent on them for any ongoing maintenance or future expansions, too. For how this can go wrong, look at the story of the Translohr (some sort of guided bus touted as a cheaper alternative to a conventional steel wheel tram), where the cities who bought that system subsequently had difficulties in persuading Alstom (who had bought up the tram part of the Translohr technology and eventually decided to sort of discontinue that system) to continue providing maintenance support or possibly even additional vehicles for the exisiting Translohr installations.