Well I can't say for sure, as it's literally just started up, but there's a lot of excitement around the new community that's starting to evolve around the very new @photofeed, led by @ cryptoctupus, and it looks very promising for photography. They're laying down guidelines and I'm really hoping to see an effort from the whole community their to find an answer to plagiarism, as it's obviously a big problem to photographers and those who would like to support us, but often have to think more than twice as to whether the photograph actually belongs to the person who is posting it.
Another is @openmic where @luzchypher and his amazing team of helpers and supporters are doing an unbelievably amazing things for their community, looking out for every one and really taking every step to block the scammers plagiarising music, to the extent where they've caught people entering material stolen from other members' youtube channel. They've had a lot o contend with, but they step up to the task each time the scammers find another way in. They now get members to say Steemit Open Mic Week (whatever number it is)at the start of their video recording to make sure entrants are entering a freshly recorded vesion of a song which has stopped the scammers from stealing content off youtube and posting it as theirs. The effort they put in there is huge and with so much love for the music and the musicians.
I can't speak highly enough about it, I've been really bowled over by the atmosphere and love over at the Steemit open mic. Here's a link to the latest rule changes. Youcan see what Luzcypher's team have had to deal with.
https://steemit.com/openmic/@luzcypher/new-rule-for-entering-steemit-open-mic-and-the-open-mic-songwriters-challenge