Before Arabic was used for chatting because it was non-existent, Arabophones used to chat on MSN (yes, MSN!) using latinized Arabic, and the missing letters which could not be written was replaced with an Arabic numeral closest to it - ء by 2 ح by 7 and so on. So BankMed is capitalizing on this slang to write "Me7rez" (worthy) which is an account which offers 7 free services (and 1% cashback). I am assuming, youngsters are the target of the ad and the account though I am not sure as I do not know the eldest category of people to whom such an ad appeals while written this way.
