maybe my.com wants to think about this...
in short, there is the option to gain money from the users cpu which will let you access new customers, those who either cant donate or do not want to donate for whatever reason but have no problem with providing CPU power in exchange for BC
i think they take 30% so you might want to make an own so you can take 100% or whatever
i guess some ppl would love to let their PC "farm" for them, haha