Recruit a friend in BC:
-triple xp for both players on an unlimited number of characters.
-could boost recruiter one level up to 60 for every two levels earned by rectuitee.
-free summon every 30 mins.
-free epic mount.
TBC classic boost:
-one per account.
-costs money on every account you use it on.
-only boosts to lv 58.
My only issue with the current boost is that they are charging for it when recruit a friend and one boost per expansion has been free.
I vaguely remember doing the RAF boost back then with a friend who ran me through Zul’Furrak for most of the way. We did it in one sitting albeit was 8 hours at the time, but got my alt ready for outlands leveling. We also had a third person in the group not sure if this had any effect, but it was really fast.
You technically still have to play the game w/ RAF but it still only takes a good month or two of play (depending on how much you play, can be less) to get a lvl 60 in every class with it, it is way more OP especially with profession CDs.