What turns off traders from Rebate services

Hi All

We are a rebate service that targets mainly the UK and European traders, and we just wanted to know what turns traders off this type of service. All comments are welcome as we aim to provide a service that is transparent and trustworthy for all our clients

Many Thanks
TC

To clarify on how we provide transparency : our clients can request screenshots/pdf's of the commission reports that out brokers provide (obviously not everyone's commissions but just the trader requesting the data)