Am I able to see an overview of how much I spend on contractor subscription fees?

Yes, you are. From the Payment Methods tab, you're able to see: 

• How many billable contractors you are being charged for.
• The total amount you will be charged for the contractors.
• When you will be charged.

To do any of the above: 

1. Go to the Payment Methods and click on See more.
   
   
   
   
2. From the sidebar, you get an overview of your upcoming payment and all the billable contractors you're being charged for.
   
   

If you're no longer working with a particular contractor, you can deactivate their profile.

See also: How to deactivate a contractor's profile