This feature allows you give your clients a choice of fee base price plans at listing placements.
Highlights of the attached price plans feature:
You control the attachment of price plans and additional price plans within the same admin tool page:
USERS/USER GROUPS > USER GROUPS HOME > EDIT (next to the user group to affect)
And within that admin tool page you would see the following admin tool:
Once you click the edit button to attach additional price plans you'll see the following:
Within that screenshot you'll see:
Once you've attached a few choices you should have something like:
and once setup your clients will see the following choices on the client side when they choose to place a listing:
You would go to the admin tool above and click the "delete" button as shown below:
And to remove that option from displaying to clients delete all choices you have attached. If you do that then the default price plans for that user group will be the sole effect on pricing for users in that user group.