Kids make maps. Stuff in the maps is sold for Roblox bucks. Roblox bucks cost money to buy. The kid who makes the map gets the Roblox bucks, and can sell them. The problem is you only get 30% back when you sell a Roblox buck.
So kids spend time making big maps and servers, buying ads, getting shoutouts on YouTube/whatever, and Roblox takes a 70% cut from all of it
Is labor. There is a whole market of Roblox related things, there are job sites, freelance sites that employ kids to work on design/programming/marketing of these game modes. To pay them the game currency that maybe later can be traded for real money.
A normal business, yes. Normal businesses are highly and cruelly exploitative, which is why we decided 80 years ago (in the US) that children, at the very least, should be protected from them.
I get what you are saying, and actually agree with out. But you don't have to be an asshole about it. No one has the obligation to attend your tantrums.
Children make games on Roblox (real games, the thing people do working in the industry), Roblox makes money off those games and pays close to nothing to the children. Therefore, exploits children.
Sometimes, there are already resources explaining more clearly and thoroughly than we could. And although I'm unsure if this case qualifies, there are definitely topics that can't be reduced to a few sentences. Thus, a reputable link is often worth more to both sides: it saves the explainer time and effort while informing the target far better.
If you don't want to engage with the content, I believe there are better ways to go about it than being rude to people who were likely trying to help.