Last night I dreamed about making the database have a table of usernames and then a table for each usernames, but I don't think that's a version 1 feature; if pkmncollectors gets to 10000 transactions in a couple of years, then the database might hit 40MB of RAM in two years as it is now, maybe (if each transaction is 4K which is unlikely). It's always possible to change this later; I don't think it's worth doing right now. If you know more about databases and think I'm wrong, let me know!