Selling run against gil are not against ToS.
I didnt see any part of ToS that says you cant have an afk in the run.
Nothing else to give freely gils to another people with no reason.
and nothing to trade an help against gil...

RMT are against tos because it is forbidden to trade in game things against real things. (so real money vs in game money. real money vs in game service ... )

There is ethical matter with runselling, but not legal matter...