Good, PSL's are a highway robbery anyway.
How do we get people to pay more for seats that are already overpriced to being with? We'll ask them to buy the rights to buy a seat.
Brilliant!
Can you imagine doing this at a restaurant?
"I'd like the fish please"
-"Sir, we cannot simply sell you a fish. You first need to buy the rights to buy a fish. After you do that, then we can sell you the fish"
"Wait, I have to pay to have the right to pay?"