I've run a trial with some 10-day trial accounts I only ran em up to 15 or so, but it seemed to be working fine. I was only doing that with 3 accounts and I want to try 4 so I'm retesting now.



But you aren't ever gifting gifted levels. i.e. if you ran 2 toons up to 60, you could then gift a 3rd toon to 60 (30 gifts from each account) but that toon would not be able to gift any levels to a 4th toon - because he hasn't earned any levels.



You only gift 1 level for every 2 that you grind yourself.