We're quite keen to do this in the future, we mentioned this in our proposal. It takes a step towards allowing valuable content to be rewarded for an indefinite amount of time.
As per @howo's comment, and I haven't done the math, but I wouldn't be surprised if the levels of engagement outweigh any revenue subtracted from sharing.
With the above said, the value of this for Quello will come with more daily active users, so although it's definitely on our radar, there are a few stepping stones before this becomes a part of the site 👍
Looking forward to it !