Originally Posted by
eddyak
They still need to roll the Servants in the first place, they need to have spare Servants for the actual trading part, "activity" can have minimum requirements, and you could also be limited to trading with people at the part of the story you're at, also so that people don't get spoiled by somebody dropping a Moriarty in their lap before EoR. Also, records can show who's been abusing the system- a bunch of barely active accounts trading away to a main super-account? Trade lock for a few months, ban for repeat offenders.
And frankly, if somebody manages to keep three accounts alive just to get their Eresh to NP5 F2P, I'd be impressed.