How can I profit from unused compute capacity and storage hardware in?
You can certainly benefit from selling your unused diskspace, you can use something like FileCoin to put your unused space into their network and then collect a fee. What you have to keep in mind though is that the price of storage is extremely cheap: Google Drive - Pricing Guide $1.99 for 100GB So lets say that you had a 1TB drive with 500GB of free capacity, that would mean that you can earn $9.95/mo from that unused space by donating it to a service. You can benefit from it, however the monthly returns are going to be rather small, then of course there will be some bandwidth consumption, and also the question of how long your computer needs to be powered on. Otherwise the files that are stored on it by paying customers cant be retrieved. So while it is technically possible, you arent looking at a very large return.