Thanks, you've obviously thought about these things. I agree that 30 days is too long default for payout, but that you stop earning money after 7 days is too short in my opinion. Would therefore be interesting to know how it works for Golos. To renew, is an interesting idea, I've thought that perhaps the author could choose length himself, but then he'll also control time for the curation...
BTW: Take a look at @theluke's OpenSteem if you haven't, should be relevant.