> How do you that with Gemini?
You keep it isolated from the ecosystem in which all of those things are taking place.
> The moment this "parallel ecosystem" showed any content that hinted at something lucrative, you will have people creating bridges between the two networks. Case in point: Google and USENET.
The whole point is to minimize the chance of that happening -- by limiting mainstream appeal, keeping it a niche, and avoiding Eternal September -- and to maximize the friction of bridging these two ecosystems. And so far, they've done a fairly good job of it, since Gemini has been expanding for six years without any indication of any of this starting to happen.