ReProposal: Spam Prevention - Convert from system-based rewards to voter based rewards

[tsetse]

They have delayed the rollout of some features in order to try preventing a neuron market from emerging. I had thought it was a foregone conclusion it would happen, but I guess not. Check out the last comment by Lara Schmid in this thread:

Proposal: Remove the is_self_authenticating restriction on Neuron Ownership

Hi all, I am a researcher in the NNS team. As has already been mentioned in this post, a possible worry is that canisters as neuron controllers might benefit neuron markets, which would be undesirable. Therefore, to make a better recommendation whether neuron control should be opened up to canisters now, we are currently looking into some options how the chances of markets could maybe be mitigated with additional measures. Just wanted to provide this context why we take a bit longer to get b…