How long does this "pay 17% of your salary" apply? What if my first job pays less and then I switch jobs, or I get a raise that goes over the $50K but only after a couple years?

Maybe an explanation is: CS students usually don't get entry-level jobs that pay more than 50K EUR, often probably less. So maybe they hope that they never have to pay back. Or they don't care and are happy to have a good education after all.

I'm happy for you and the growth and maybe I missed something :)