I think I figured it out that it had to run non stop for at least half a year to break even on the equipment cost. Maybe a little longer. Counting equipment cost that doesn’t sound too far off. But I am curious if they mean mining btc it’s self or mining a btc worth of some other coin. There are machines designed specifically for mining btc which are so much faster than any GPU out there. ASICs are just insane. So I don’t even try. Most are mining ETH now bc its profitable.