IMHO 42 ZEN is too low entry level for a Service Node. Whales would be able to manipulate the whole network..
Make it at least 100 ZEN and a reward ratio miners/nodes/governance at 65%/25%/10%
Nodes are important and they should be well paid.
I believe the idea behind the low buy-in price is to get as many nodes (decentralized) as possible early on. Because of this and the fact that (from what I hear) Zen has been one of the more profitable coins to mine, their plan is working. Ive seen people on Telegram and Slack who have never mined before asking how to begin.
On the other hand you could have a good point. The founders have said many times that the system is not perfect and they are open to suggestions, they are very accessible on Slack; You could go there and make that suggestion, and give your reasons why.