say I have 5 accounts, and then the almighty purge happens. As a result, a username I want becomes available. May I have six accounts open until I can get all of my Neopets to the new account? This seems iffy, but it's merely hypothetical!
The spirit of the rule is to stop people from cheating or creating tons of accounts. A temporary 6th account isn't likely to get you in trouble, as long as you're not abusing site rules on the side accounts. If you're still concerned about it, we recommend allowing one of your side accounts to lay dormant while you transfer your Neopets over.