I thought they didn't want to implement an emote like this...

[Celef]

That's wrong though. That falls more in the P2W category, not RMT. While technically it is real money trading, you're 'trading' your money to SE, not a third party company/person gaining profit from someone else's product, which is the only reason RMT is illegal.

Then why don't they allow selling CS items to other players in exchange for gils via the gift option ?
In the end, SE gets the real money not a third person/company

You know Alimdia, RMT is not RMT as long as it profits SE and not the players

[Kit-Kat]

Then why don't they allow selling CS items to other players in exchange for gils via the gift option ?
In the end, SE gets the real money not a third person/company

You know Alimdia, RMT is not RMT as long as it profits SE and not the players

Because it's not a safe trade. Scams may happen, and SE can't control that. People always abuse it in many games (I personally happened to experience it) and SE would get a shitstorm of support tickets.