I don't mind allowing more than one account, but I would limit it to a maximum of two accounts. I think a person can have two accounts because in the second one he expresses political opinions that he does not express in the first one, as in the typical example of theymos. Also if it is to monetize them, since signature campaigns are allowed and give a lot of life to the forum it seems to me that a person can have two accounts and monetize them by bringing constructiveness and quality to the forum. But the cases of many accounts that have been discovered are always linked to farms, merit exchanges and breaking the rules in general. It seems absurd to me that one person is allowed to have 5, 10 or 1,000 accounts.
Another thing is how this could be enforced.