Saw a new miner being pitched at BTC Prague and did a quick calculation. With 1 TH/s at 40w and at $0 cost for electricity it's making ~ $1.38/month for €225. Meaning the ROI is 13.58 years (assuming that the difficulty doesn't increase) https://image.nostr.build/1ca741cee8644ac41588e3d33b5af6235d157beee0a5caa0e3ca864e036b5290.png