Therefor i propose lowering the factor of 2880
There is another source of income that we have to consider (maybe in later versions).
We can think about services that people are willing to pay a small amount of SPR for.
For example an Alert-Service of some kind.
People might want to receive notification when there is movement in some address,
or when a blockchain hasn't updated for X amount of time, or a new record transaction size within a block has been made,
or any other thinkable "block chain event" that might happen....etc...
Pay 0.1 SPR (or something) and the servicenode network notifies you when something that interests you happens.
This additional income then goes to miners (and ergo servicenodes).
Yep, those 30-40% will be taken from reward + fees.