Coupang Inc (NYSE: CPNG) is up more than 10% on Friday after announcing a rather big increase in its monthly membership fee.Are you looking for signals & alerts from pro-traders? Sign-up to Invezz Signals™ for FREE. Takes 2 mins.Coupang stock is already up more than 50%Copy link to sectionThe “WOW” membership will now cost incoming subscribers a whopping 7,890 won – up from 4,990 thus far. Existing clients will have to pay the higher fee from August. Coupang ended last year with some 14 million WOW members. ...