Ads for those who aren't signed in is a pretty good idea actually. If this place is bringing in traffic and people aren't signing up/aware, we may as well capitalise on it.
Would also help remove the pains of a 7 day curation window and keep "old" posts earning if they're picked up elsewhere. I'd be much more keen to post videos to Hive knowing I could earn from those months down the line, and be much happier putting that time and effort into creating video posts knowing this.