I appreciate your disappointment, but the reality is that the wholesale price of LGCs has increased a lot since we last set the price (which we haven't changed since we started operating). We're absorbing this increase in terms of the mandatory LGC component (ie: for non-GreenPower), but for voluntary GreenPower we're passing it through. We attempted to explain it at
Changes to our GreenPower Pricing | Powershop Australia News and Blog Archive
You can get an indication of wholesale LGC prices from
Mercari and you can see that the Cal 15 LGCs are around $55 each at the moment. When you add GST that's 6.05c/kWh for 100% GreenPower. That is, we're still charging customers less than what it costs us to provide 100% GreenPower. The wholesale price moves around a bit, and we ideally wouldn't change our retail price for GreenPower more often than once every 12 months, so we've set it at what we hope will be close to wholesale for the next year. If we'd left it at 4.95c inc. GST we'd be paying 18% of each customer's GreenPower costs, out of our pocket (effectively out of non-GreenPower customers' pockets).
We're not bad guys, and we didn't do this for the fun of it, but take comfort in the fact that the rising LGC price reflects a higher market demand for renewable energy.