How can make the "Market Fee" Robux higher for more Player Points?

I'm working on a Player Points game, I managed to create 2 DevProducts for the game, but the problem is that if some one wants to add 50 Points into the game, they must pay 166 Robux, which sounds too much high-priced. I don't know about you guys, but I've seen some places with a lower price for 50 Player Points, yet I took a other look and I can't figure out what's the catch.

Does the DevProduct has a different system than the MarketFee from (example: Game passes, cloths ect...?) that you can manually edit on the Roblox Studio?

Let's get something right here... Firstly, 1R$ is no longer 1PP, but it's 100 Now. Secondly, it's the money that goes to ROBLOX that gets converted into Points, this is a HUGE advantage to NBC's because 90% of the price goes as points. To award points, you need to have some available...

Here's an example: Bob is playing a Game. He buys a Game Pass or Dev.Prod. for 10R$. The Owner is BC. The owner gets 7R$ and the Server gets 300 Player Points since 3R$ goes to ROBLOX.