Adjusting prices by demographic is so common in many industries. Charging less for children, families and the elderly is the same thing. Charging less for women in clubs. Same with booking hotels and flights, based on browsing history, IP address, cookies and the extrapolated demographic. Even a repair contractor adjusts his prices up for someone who lives in a mansion with expensive cars in the driveway, and down fo…
This is the key bit here. You go in expecting a level-ish playing field (it's not really level, obviously, but for other reasons.) Turns out that to even get access to the same service as young people, you have to pay 5 times as much as them. Dating when you're older is already difficult so making it even more difficult isn't exactly great.
Now, the argument here is that Premium is a choice, you don't have to get it. That's true but I still find it unfair that certain categories get an artificially inflated price. I'm fine with discounts for younger people as they tend to earn less (especially queer women, which are noted as having the lowest asking price for Premium.) However, it shouldn't come at the expense of other users.