Wilko sells giftcards, as does WH Smiths. Superdrug does but only for superdrug spend. I've had offers on my BA cards now for Wilkos, WHSmith, Superdrug and Amazon. Everything so far has credited, just seeing if the partner card does as well as my wife had the same offers independently.
I've had similar offers on my Gold Rewards card and SPG, to the point where I have quite a wad of John Lewis cards plus a healthy Amazon balance.
One offer I haven't managed to trigger is the Paypal one. I've spent £30 in one transaction both at Opado and via ebay, but so far nothing. Anyone had anything come in for that one?
Amex are certainly going into overdrive on offers at the moment, which is welcome after a quiet period.