I flew on a Qantas operated and marketed flight back in April, in a fare class earning 25%. The EQMs originally posted as 25% of miles flown (300ish) PLUS a 50% Gold bonus, but 2 months later were removed and replaced with a 500 mile minimum PLUS 50% Gold bonus. This was unexpected, as I always thought 500 mile minimums only applied where the fare class earned you 100% in the first place.