Is this considering RMT by SE ?

[Lexia]

Or if too much of this happens they will take away the gifting option.

There's no could, they do consider it RMT.

SE likes money too much which why they charge what they do for the mog shop items. The money going to them not some gil selling company so SE would most likely turn a blind eye to it. Why would a company want to punish someone for giving them money.