This is no different from having an officer in the guild fill that roll - there's still only x number of active players and x number of teams that are available. It's not cheating, it's not out of bounds, it's not against TOS - it's perfectly fine. Nothing wrong with asking a buddy for advice - or even paying someone to be an advisor - that's called consulting and it's done everywhere, all over the world, in every situation imaginable. If someone is making money doing that for guilds in this game - good on them for finding such a cushy gig.