As long as you book direct on emirates' website - the cashback would pay out - unless ofcourse you are saying that prices on comparison website are less by 100 or more as compared to emirates' own website?
I see spend £800 and get £150 off on my account :)
Cheaper to book via comparison website. You will notice price via amex is higher and then the £100 brings it in line with comparison website
Just booked Manchester > DUBAI > Bangkok > Hong Kong > Manchester total £1000. Total of £900 for two people with cash back. 5 nights in each place too. Bargain if you ask me. Heat
Doh. Quite witty. Went straight over my head!