when customer subscribe to service should be redirect to same service

when customer subscribe to new service {subscribe_url} then redirect to services page.

should be redirect to same service 

I was looking into the code and I think this is https://github.com/3scale/porta/blob/master/lib/developer_portal/app/controllers/developer_portal/admin/service_contracts_controller.rb#L32

is there a reason for redirect to services?