I am personally trying out as many as the communities as I can, and seeing which are my favorite to read and gauging where it will be the most profitable to post through.
I like how I can blog on different interfaces. Its a great way to organize my posts.
All of my actifit posts are on that front end, palnet is a catch all, maybe I can use neoxian for my ulog, and I definately look forward to blogging more about crypto.
Because I know so much more than the average person and I could REALLY use an interface that shows ONLY my crypto posts.