You will run into some talk sites which market themselves as "Free". This implies that you could see a webcam that is live as a bunch session.
All chatting at the same time to the one model/performer so you're one of dozens (maybe hundreds) of other men and women.
the purpose of the model would be to achieve a particular objective for the session, as an example 200 tokens. They will certainly perform acts that are sexy drawing for a vibrator, fingering on their own, having fun with their breasts etc, until that objective is reached.
If the objective is reached, they will then perform the "promised" work which is much more intimate than the accumulation.