Wording Roblox trying to sell is deceiving.

Compare with other platforms. Payout model is as simple as platform takes % or fixed fee, rest is dev to keep. There's no verbiage that says dev share is 67% but you they actually get paid less.

What exactly goes behind the platform is platform's business, not the user. If developers are getting paid out $0.25 per dollar spent, that's the developers profit and rest is spent running the platform which is Roblox's concern.