First mistake of Perplexity was strategical one of not going head to head with Google and making its product open and free to use. They could've offered freemiu

First mistake of Perplexity was strategical one of not going head to head with Google and making its product open and free to use. They could've offered freemium type model where you could use Perplexity for free and see ads but if you want no ads and some extra perks, you can buy subscription. The second problem is not exclusive to Perplexity but to overall LLM chat industry and that is; we as users don't know how their index looks like and how they rank their results (answers). When I ask Perplexity a question, how does it decide which sources to pick when answering me?