The algorithm is efficient and does not require as much energy, so your energy costs are not as high as on other coins. I am very pleased to have joined this project.
The difference in energy costs between coins is negligible.
And the energy cost does not determine the profitability of a coin
I don't think so. Electricity bills are one of main consideration of miners, besides total hashrates of network and difficulty. All three components decide real profits for miners at specific point of time.