Well, you sked for something to heat your house now, not something you might get in March April

Three are two things I disliked about it, locked on braiins , don't know if you care and their math:
Stretch your cold fist
$0.12/day is all you need
Plug, heat, and earn $0.3 each day
140w that's 3.3khw so it would mean less than 4 cents per kwh, not really US average!
It is legit but that's more a node than a miner, at 3th/s you're best just buying coins now and pay your bills directly with fiat.
- The S9, likely only running 1 board (I think that's possible) It's very inexpensive, but ancient and inefficient. It would get the job done, but the fan noise is a downside.
If you go down to one board you stop having 1300W inside the box and more like 400W, less heat, so no need for that airflow anymore, less fan speed nedeed so less noise.