Anything that provides players who pay extra with extra Gil.

That line was crossed back in 2.2, when players could buy two extra Retainers and send them out on daily Ventures and effectively double the number of Allagan Silver Pieces (which are solely there to NPC for Gil) they bring in. Small amount of extra Gil for an added cost on your subscription, but extra Gil for your dollar is still extra Gil.

Actually, I probably just draw the line right at the start. It's lazy. People can claim I'm just "whining" and that I "just want stuff handed to me for free", I don't care. I would have much rather have had Sleipnir be something you work towards in game so when a newb asks me how I got the mount (I haven't gotten it, btw) I can give an answer that isn't pathetic (it is so sad that Sleipnir Barding is more impressive than Sleipnir himself...). I would much rather have seen Delivery Moogle quests for each of the Scions that rewards you with their respective minion. The whole "You just want it handed to you for free" argument just comes off as pathetic I think... I want it in the game as part of my subscription. That is neither free, nor handed to me. Visiting the cash shop and just buying Sleipnir might not be free (though a popular argument I see is that "It isn't that expensive", "Just save up for a week"), but it sure as hell is simply handed to you.