You technically aren't wrong.

But, in my case, I already had all of the capacity paid for regardless. I'd say, lemmy runs me around 20-30w of load total.

30w * 24 hours * 30 days = 21,600Wh / 1,000 = 21Kwh * 0.08c = 1.68$ per month.

In reality, the power load is quite a bit less, and my calculations don't account for the solar panels on my roof.

Given, I have around 140-160T of total storage capacity, its not really worth putting a price on the small amount used by lemmy. My internet is paid regardless, and lemmy usage is typically pretty low (typically measured in Kb/s). So, not really worth putting a price here, as it averages less then 1% of my total connection.

If, I wanted to put a price tag on it, my labor to actually support and maintain it, would be where all of the money went to.