MAPS Excessive Price Increase

I just renewed my MAPS subscription. As a background I'm a one person organisation. 

For many years the price was A$440 inc GST. 

This year, the price was over A$710 inc GST. Which is a price increase of over 75%.

I was told this was because now all pricing is based on USD so I'm paying the equivalent of US$400, and that it's not a price increase.

I'm posting this to raise my objection to the exhorbitant price increase, and find out if other people have also been similarly effected.