It sounds like both of you guys are wildly off the mark.
Steam, the App Store, the Android stores, now Roblox... they have paid out like hundreds of billions to game developers over the years, more money per year directly to IP creators than any other category ever in all of history. So anything that starts out by characterizing them as the antagonist will fail to attract successful game developers, regardless of how much money you spend acquiring an audience or paying up front for content. See Exhibit A, Epic Games Store.
What is the problem with Roblox? The games suck. So many utterly garbage shitty clones. The shitty stupid mindless microtransactions in their shitty clones. There are no good Roblox titles. I don't care how many 8 year olds play the games, I don't care how much money in spent, they're all complete garbage. If you can't say that, that you and no one you know with a mature brain plays these shitty games, you are going to struggle to communicate with game developers.
What is the greatest threat to Roblox? Apple could start refunding parents on IAP. You're talking about such sophisticated stuff that doesn't matter. A successful Roblox developer tried to convince me the money came from $5/mo Robux subs and look, that's delusional. Even if you ask the developers they are delusional. The money is obviously from whales, because it's always from whales, and like, what does a 8 year old whale look like? An utter menace. Spending money mom and dad would love to get back.
What is the closest platform to achieving the goals you describe? Apple Arcade. It doesn't extract the full value from whales, so it will never be the #1 source of revenue for game developers, but the games are good!
Who is the real antagonist? Ketchapp (https://venturebeat.com/2014/03/30/threes-vs-2048-when-rip-o...). Riot Games. Epic Games. Most of Tencent really. Even Blizzard's last title which I love, Overwatch, is more Team Fortress than it is not.
There is one thing that rings true. It has been characterized as "it is way easier and more personally lucrative to be a money manager than to be someone the money manager invests in." Epic and Roblox are really tales about the power of capital, that they reinvented and cloned and pivoted their way into completely accidental success, being led by chickens with their heads cut off with fundamentally cloned and shitty IP, because they had huge amounts of money. The greatest ingredient of their success is owning the rights to the dice when they roll six, and rolling many, many dice.