Q u o t e:
Actually, somewhere around 550 (it's hard to tell because it stops counting at 500) you can no longer invite new members.
Actually, Pylades, Faizaniel is indeed correct; there is currently no limit to the number of players who may be invited into a guild, but the fact that only the first 500 members are visible is one of which our Development Team is aware, and that they are looking into for the future. I do apologise, however, for any confusion you may have been caused. :)
Ce sont ces fenêtres qui m'appellent...