Great point @exyle. I think the seven days expiration period on the content is a disincentive to produce evergreen content. In fact, why would I create an evergreen piece if after seven days I don't get rewarded?
I'd rather be better to surf the news wave to gain short-term buzz that gives me more upvotes and rewards in return. Also, to produce evergreen content, it takes a long time, and it usually grows organically. And to do so, it needs months.
As Steemit gains most of its traffic from Google, before the saerch engine adjust its signals a week is too short. So definitely DLive initiative is brilliant in that sense. I hope all the Steem Blockchain apps will use this approach to take a step forward regarding content quality.