I favor using current inflation mechanics and allocate a portion on some of the newly generated STEEM. Donation model won't be enough to sustain the proposals.

But the question is what will we cut off? Witness rewards? Author rewards? I am not sure about that topic yet.

On a side note, if you want to have a talk about using dPoll, and need help with organizing or requirements (stake based voting is not there yet, I can focus on shipping it in the next couple of days.) I am on steem.chat as @emrebeyler, and emrebeyler#9263 on Discord.