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Q: I understand that only one entry per character per lottery period is allowed, but is there any limit per account?
A: The restriction that players may only purchase and maintain one private and one free company plot per World per service account remains unchanged. For this reason, you cannot submit an entry for a free company plot on a given World if another character on the same account purchased and maintains a free company plot. Likewise, you cannot submit an entry for a private plot on that World if another character on the same account purchased and maintains a private plot
No where does it state there is only one entry per service account. It is one entry per character.