Ignoring the VAT / Taxation element of this scheme, let's think about the flight school the student is learning through.
Do they really want their students competing online against them for customers? Given that the potential customer is searching the internet and has found a number of organisations able to offer let's say, a trial lesson, at a certain price at a certain airfield - do the school and their students want to compete for that business?
I know that if I had quoted a customer and then found someone else trying to sell me that same customer with "something in it for them" I'd tell them where to stick it. The student is unable to do the job and if he started passing business to competitors on the airfield I'm sure the relationship with the school would soon evaporate.
Don't get me wrong - I'm all for making training more cost effective for students, but getting them to buy a rod so they can fish in your pond seems a pretty stupid idea.