SIP-4: Enable community proposals on Snapshot

For the first two rounds of Streamr governance voting, only the Streamr team has been able to submit governance proposals. This was a temporary limitation to first get some hands-on experience with how the Snapshot tool works, and to learn what participation level can roughly be expected from the community of token holders. However, we believe that for governance to be truly decentralized, any stakeholder in the ecosystem should be able to submit proposals.

SIP-4 proposes that community members are given the option to submit governance proposals by unlocking the Community tab in Snapshot. This will change the Snapshot interface to display two tabs: Core and Community. The Core tab shows proposals submitted by the Streamr team in the quarterly governance rounds, while the Community tab shows proposals submitted by other token holders.

Successful community proposals would go through two rounds of voting as follows:

1. The DATA holder adds their proposal to Snapshot. It will appear on the Community tab, and other token holders can vote on it while the proposal is open. Community proposals can be submitted at any time (not only during the quarterly Core voting periods).
2. If the majority of token-weighted votes cast on the proposal support it, AND it is supported by at least 30M DATA, it will be upgraded to a Core proposal in the next quarterly round of governance voting. Any unclarity in the proposal can be ironed out, with the Streamr team, before the Core round. As a Core proposal, it will also get full promotion on Streamr social media channels to maximise participation.

To prevent proposal spam, submitting proposals should require the person to have a minimum amount of DATA in their wallet. A low threshold is more inclusive and thus preferred, but a higher threshold could help ensure that only serious, quality proposals are submitted.

This proposal recommends that the threshold for submitting community proposals is set to 25,000 DATA. The minimum balance, as well as the 30M DATA acceptance parameter, can be later changed by other governance proposals, if they turn out to be too high or low.