What's the point of pollsters registering intentions to vote for a party that doesn't exist?

The Herald digi poll is out. National is ahead of Labour, of course, and the Greens reach the 5% threshold. The Maori Party is polling nearly double that of NZ First. The Kiwi Party is on 0.2, twice that of United Future.

The Christian Heritage Party, which doesn`t exist, is also polling 0.2% , twice that of United Future. One wonders what supporters of the Christian Heritage Party will do when they get to the polling booth.