So I have been on fet since long ago when it started...
its my kink version of Facebook. It's how I keep up with my friends in the lifestyle and those who I have connected with at events who live all over the country. I also use it to locate events, post my events, as well as find events looking for educators (as I have been teaching kink classes since 2007). I also use it as a place to keep up with what is going on in the communities near me.
I have never used or intended it to be a dating site. That said my 2 current partners came from random stumbles on fet posts or photos that had me reaching out with a message with more questions. Now, I need to clarify that I had not reached out to them with the intentions of a relationship. I reached out because of peeked curiosities and in search of new information. But over time and through meeting formed friendships that quickly grew to more.
It happens but that was not the concept or intent of the site originally. I also do get random skeezy messages there from disrespectful dudes who can't read, but that happens fairly irregularly compared to what I hear from some others.
As with all things YMMV!