According to their main page, it’s already added.

When you say LOL as Alliance character in World of Warcraft, it’s seen as KEK for Horde characters. W is added the same way as saying that something is KEWL instead of COOL.

So this person basically said LOL in a manner that’s understandable mostly for 30+ year olds ;)

Do you know how long this $1 promo will last? I’m unlucky this month and can’t afford it until next month.