"Since when are all the big media so interested in a little Destiny Church meeting?
"You've gotta ask some questions. Surely there must be better news things than picking on this half-caste Maori about what kind of car he drives and [saying] I'm creaming you fellas for money.
"If they say I'm so rich and you're so poor, how do the two things happen?"
Activist Josie Butler, who shot to fame for throwing a sex toy at former Economic Development Minister Steven Joyce last year, organised the party to protest against Tamaki's "homophobic hate slur".
She said it also aimed to show people attending Tamaki's talk, who may be struggling with sexuality, that it's "okay to be gay".
"Hopefully he was afraid that we would genuinely cause an earthquake, and has decided not to come," organisers wrote on the page.
Tamaki's wife Hannah last year splashed out on a second new Mercedes-Benz AMG GLE 450 Coupe.
The car has a normal retail price of $153,500.