There is an ongoing BT reward card offer since December 2019, all through January and now into February. It is still available today 05/02.20. I think BT has forgot they are offering it. Use this link to see it https://www.bt.com/broadband/deals/affiliate-offer/
You will see Superfast Fibre comes with an £80 BT Reward Card. Broadband comes with a £40 Card. Superfast Fibre 2 has nothing. Neither does Fibre essential. The prices are better on this link too. It is not a sinister link. It is the link from topcashback site. So every topcashback customer will be expecting a BT Reward Card throughout January and now February. If BT think it is no longer running the offer, then expect some grief.