Those adverts and clickbait will infect llms soon enough, just be far harder to block.
If consumer AI chatbots get enshittified, you can just grab some open source bring-your-api-keys front-end, and chat away for peanuts without ads or anything anti-user.
I use https://github.com/sigoden/aichat , but there are GUIs too.
Plus, anyone enterprising can just write a web front-end and sell it as "the ad-free AI chatbot, only $10/mo, usage limits apply".