Immediate payout from the Glücksspiral makes sense?

When I played Glücksspirale again after many years, I stumbled upon the new main prize. This amounts to 1.2 million euros immediately plus a further 1.2 million euros in 240 monthly installments of 5,000 euros each. What is interesting is that a winner can also have this second 1.2 million euros paid out in one fell swoop without having a cent deducted. This is very unusual. Normally you get significantly more paid out with an installment payment than with a one-time payment.