I totally agree with your points. busy.org has really worked hard on their front-end. Dtube videos don't not redirect you to the dtube site before playing, good reader interface, nice markdown preview with word count, now I know about the vote slider. The interesting thing about this is that you get to see not only the percentage, but also the actual value you are giving. Very interesting!
The referral part is like the great twist to this platform. It is really going to attract more people to using it. Finally, as a minnow who doesn't get much upvotes, I appreciate the Upvote of 0.06% from busy.org when I use the website and use the busy tag. Everything points to the fact that busy.org is the trending gateway to steemit.