For a combo

A charitable organization in the Avrechim neighborhood in Jerusalem that holds a lot of Torah has distributed the option of paying 220 NIS to a seminary, and they register those who pay as students, and in return, the payer can get a student card and pay very little, if any, on public transportation in the country.
Someone pointed out to them that this was exploitation and a scheme and not honest.

They replied that everything was legal.

I saw the registration form for this seminar and there are details there, including a name, email address, payment method, etc., and no mention of their studies. The registrant assumes that if I search somewhere, I will find some kind of course that I can hear about from them online, etc., but the form only lists a name, email address, payment method, etc.

Should I withdraw from this combination?