@futzle Electorate offices receive an allowance for communications, which they can spend on facebook ads or snail mail, but that ends the moment the election is called, so the party has to pick up the tab for these postal vote scams.
They do of course receive funding after the election, based on the number of first preference votes they receive, and will get a big pile of 'administrative funding' in the years ahead if the recent legislation isn't wound back