Read the article "Queensland spot prices run below zero for four days running, solar farms switch off" from 4 May 2020

https://reneweconomy.com.au/queensland-spot-prices-run-below-zero-for-four-days-running-solar-farms-switch-off-36347/

The article states that, "The negative prices over the weekend also came despite the biggest storage unit in the state, the Wivenhoe pumped hydro facility, having one of its two pumping stations operating at or near full capacity for much of the negative pricing events."

Explain why the author used of the word "despite" in the above quote. In your answer, explain the economic incentives for operating a pumped hydro unit in these conditions, and give a potential explanation for why only one unit was operating.