Now you can charge your users for Types. Each type you create can have the price in currency or points and person who post an ad can additionally pay for this type.
The most obvious usage would be adding the "Urgent" Type that will be more recognizable for website viewers.
You can also choose if the types should be displayed as above or as a select list to choose from.
The types can be configured that way you can set different prices for different Joomla User Groups - in case you want to provide higher/lower prices to different groups.