The only information we've recieved so far [to my knowledge]

•Pets will be collectable in-game through a variety of means;
-Ingame Purchase/Events/Achievements/Rewards
•Pets will have no 'advantages'
-No EXP Buff, No Stat Buff, No Bigger Boobs Buff


These completely cosmetic pets will almost certainly be a completely in-game.

Square-Enix as far as I can see has never for FFXI or XIV offered a 'Cash for items' service, and I don't see it happening any time soon.



(Unless ARR hits financial difficulties, then this would be a great idea among many others)