If the plugin doesn’t offer what you were looking for, it doesn’t mean it ‘has no function’. There are just a few additional features in the premium version and a lot more in wp.org version, such as:
– Creation of custom user roles
– Flat pricing rules based on user role or for separate user/user account on each product
-General pricing rules for whole categories/categories or separate products
..etc
You can learn about functionality on the plugin page before using and leaving bad reviews.
Sorry but @dianaclient has right. Currently also on our side it doesn’t work. We tried to set a rule with a User Role with a specific product and price 0 but doesn’t work.