The App Store review guidelines prohibit this very clearly:
> Apps should be self-contained in their bundles, and may not [...] download, install, or execute code which introduces or changes features or functionality of the app [...]
There is only one narrow exception which clearly does not apply to Roblox for several reasons; for example it's only for HTML5 content.
Tim Cook just testified to Congress that all developers are treated equally, but this seems like a clear case where an app that is "too big to fail" gets special treatment.
it's not them getting special treatment purposefully. it's been on the iOS app store since 2012.
apple's policy here is a bad one. if it were fully remove, true web browser diversity could come to iOS, and roblox could finally do JIT compilation of Lua, among so many other possibilities.
So they're grandfathered in? I wonder how much of their valuation can be attributed to the fact that it's essentially impossible for anyone to make a competitor available on iOS?