New Microsoft Cashback, overriding Quidco / TopCashback

Firstly, this is a bit of a warning - I just made a purchase in Edge, via TopCashback as I have done many times before. I have a Microsoft Rewards account to build points from Bing searches, but it seems they've rolled out a new related Cashback feature - I have no idea how it was activated, but it seems to steal the clickthroughs from TCB and Quidco
So, heads up - may need to use an alternate browser if you're using Edge

Secondly - does anyone know how to turn this off?! Everywhere I look it takes you to a page to disable Microsoft Rewards entirely- I don't want to do that, only the cashback component
Really frustrating!