Skimlinks offers full transparency on which Publishers are driving sales to Awin merchants via the reports in Awin's interface. You can download a report from the Awin platform that contains commissions with the Skimlinks domain name.
Simply go to Reports, select Transactions Report, and download the Transaction Report for Skimlinks. You will see the Publisher domains in the clickref field.
More information can be found on the Awin Wiki.