First question, could be all three or the latter two.
Second question, yeah it could be abused but with @bullsharks suggestion make it only for small/mobile/arm devices
Third question, i knew "rain" was taken @jringo came up with grcstarter@home but if we aim for small/mobile/arm it could be mobile@home or arm@home or something like that.
arm@home sounds good :-)
I still don't like the idea of modifying the way magnitude is given out though. If it is modified I would assume that you would end up with only ARM devices anyway because why would someone run a powerful machine just to give a portion of their mag to someone else?
anyone else looking to an answer for "Why donate," read my response to @bullshark's main comment.