I have a Non Public Twitter Account and a You Tube Account. I also have a Live Journal account a Blogger Account and Photo Bucket Account.
I use some Face Book but only due to some people I know post on Face Book.
As for FD sites. The so called FD Sites are almost always without exception not Financial Domination Sites. They may have started out well. However, they have been just about literally taken over by fakes, frauds, scammers, Penis Pic Senders, Insta Doms, Preverts, Psychos and a very wide assortment of low lifes.