I'm running my GTX1080Ti for this, GPU-Z is showing me that the card is using 200W while running, let's be generous and say the entire computer uses 300W while running these computations. That means 7.2kW used per day, or 223kW used per month. At my current electricity price of £0.12/kWh, this is costing me £26 a month.
I have no idea who I could even donate this to so it would make any impact whatsoever. But I know for certain that there is literally zero chance they could rent a GTX1080Ti-equipped machine for £26/month anywhere in the world.
Donating 26/month to Médecins Sans Frontières (aka Doctors Without Borders) is almost certainly going to have more of an impact than a small computation donation to FAH.
I have no idea who I could even donate this to so it would make any impact whatsoever. But I know for certain that there is literally zero chance they could rent a GTX1080Ti-equipped machine for £26/month anywhere in the world.