Seeing as it's under the PFS section, I would say yes that was only intended for PFS, otherwise it would have been put elsewhere.
PFS has it's own special rules.
To expand on BBT's comment; PFS is aimed at creating something of an equalized play environment. Everyone gets the same amount of wealth, with access to the same items, and power is balanced as best can be achieved without drastically rewriting Pathfinder entirely. So, most of the options in the game that add power in a way not directly governed by your class and race or officially granted items are restricted. No crafting allowed, thumb-less familiars, etc...
That isn't to say it's necessarily a bad way to play the game, just that there are certainly some notable differences one must be aware of.
I think that the above FAQ was meant for the "mundane" familiars (those gained without the improved familiar feat).