The third model is the platform model and thats the only one that makes sense here. An ad would send you to another site. The point of the chat is so you don't

The third model is the platform model and thats the only one that makes sense here. An ad would send you to another site. The point of the chat is so you don't have to go to all the shitty sites and deal with all the marketing speak. So the options are either: - subscription, as they do now (ala Netflix, Officd365) - free, with ads having the profit maximalisation be the exact opposite of the main selling point (ala Google, Bing, Facebook) - platform, free for the user, but taking a cut from vendors that would integrate (ala iOS, Android, Steam, Amazon, Salesforce) In other words, rather than being an ad, it could offer to buy the car directly from the chat. The later is the most profitable solution and also ensure the interests of the user and the platform align. Platforms don't care which product you buy through them, they take the same cut, and would rather make you as happy as possible so you don't go to the competitor.