According to the site, they pay the homeowner the entire cost of powering the server. They claim to save "60% of TOC" for not having to buy a dedicated datacen

According to the site, they pay the homeowner the entire cost of powering the server. They claim to save "60% of TOC" for not having to buy a dedicated datacenter building and cooling system, which sounds reasonable in the short term (although, eventually a datacenter-builder will recoup the costs of construction, while an electricity premium is constant.) It looks like homeowner also pays Nerdalize to sign on- which may make their balance sheet more reasonable, but is also only a short-term advantage if the server is leased indefinitely. In the long-run, they're probably just banking on people paying a modest premium for "green computation."