You have to understand that this so called interview is just a way to draw you in and spend in the long term more money with them.
True, but it still should never cost you more than the normal route of PPL, CPL, FI... So if thats the alternative it's perhaps worth a punt. The question then is, if the scholarship weren't on offer would you choose to train with them? Quality of training, location, chances of future employment etc. You could always do your PPL with them, try to qualify for the scholarship, and if unsuccessful embark on the CPL training elsewhere. They seem so be pretty good at offering their past CPL/FI's some work, but how much? They have quite a few commercial graduates.