If Servicenodes were available, I'm sure a lot of people around here would set-up a fair few and donate most of their profits (after hosting costs).
You would probably see donations in the region of $3,000 to $7,000 / month, mainly because it would end up being a self funding mechanism where more development would equal higher price, would generate higher value donations, would generate more Bittrex activity.
Servicenodes would become the main patrons.
Patron Nodes, lol. I will definitely donate some of my profits from nodes. We are a ways off from that it would seem though.

The code for Servicenodes was written a long time ago. Testing started in January 2015, here
https://bitcointalk.org/index.php?topic=938222.msg10279541#msg10279541An initial version can be launched with a little effort to get the patron funding rolling to get full time development going.
The long-term vision / goal for what Servicenodes will eventually become can then be changed at will.