My list. I haven't used all of them.
Favourite is SNK - full size MZ eye cream (Deluxe member)
I'm not signed up to Diptyque but now wondering if I should. I assume you need a purchase history or to reach a certain level for a candle?
Next best gift was probably Rituals - full size hand wash (had to make purchase so I bought the soap bar I use regularly).
YSL candle (scent is Y which I think is their men's range) which I added to my order with them. I can't see me liking this so it will go to DS or on Vinted.
I seem to have got 2 Sephora birthday gifts (Glow Recipe minis). I went in store to collect but it's not registered on my account anywhere that I picked it up so I could add it again to an online order.
Cult Beauty £25 off sounds good but as it's a £100 spend I did debate letting it expire. In the end I used it to order some hair and body stuff. I noted that it stacks with Gold member discounts so I was able to add Augustinus Bader products with the 15% Gold discount then stack the £25 off on top. I didn't use it on AB in the end but the info might be useful for someone else.
Harrods double points worked out for me because I was going to the store anyway planning to purchase.
HN was 15% online only code (used it to get a Dermalogica serum, Dior lipstick, perfume discovery set and Maria Nila Hairspray + GWP) This was a bit impulsive as I really didn't need a 2nd GWP)
Anthropologie 15% code (used in store on clothes)
Olive Young 10 points ($10) (not used)
Jarrolds 20% code (used to get a gift for someone else)
Clarins £10 off £50 (not used)
Look Fantastic £5 code (bought multi vitamins)
Kiko Milano free nail polish with order (not used - if I end up getting something later and it's still valid I will)
Holland and Barrett in store choice of - (might go in next week)
Holland & Barrett High Protein BBQ Plant Puff Crisps
Holland & Barrett Ginger Flapjack
Holland & Barrett Apple & Cinnamon Flapjack
Dr Organic Moroccan Argan Oil Lip Balm SPF 15
Dr. PawPaw Shimmer Balm
Lancome 10% code (not worth it unless I was going to buy anyway)
Shiseido £10 gift card (not clear if there's a min spend as I haven't checked but probably won't redeem)
Lisa Eldridge points added (not sure how many)
Boots Double points all month
Something free in the Greggs app (not checked yet)