I'd definitely prefer daily backups, especially if there's an event going on. I'd hate to do all of the work on an event only to have the site crash and erase everything, and the only backup is from last week. I have to voice my concern over lost things- if I hatched a shiny/albino/melan or had x amount of currency, and the site crashed and had to go back to a backup where said Pokemon/currency doesn't exist, would it be replaced or would we be SOL?