Can anyone shed any light on this TCB / COS query

Posted 18th Nov 2015
Some TCB offers on snap & save now say this in their terms & conditions that I have pasted below,since when has TCB been in the COS network ? :

This offer is provided by CheckoutSmart and will only be awarded once, whether claimed via Topcashback or via any other publisher in the CheckoutSmart network.
Community Updates