Profiles without pictures are a red flag to me. It indicteds that person is not single, so they need to hide.
My profession and my desire to be honest on this site are not necessarily compatible. Therefore I have to keep both separate. There are things that I reference on this site that I would rather my coworkers or otherwise didn't gossip about including relationship advice and personal issues so I don't post pictures. If I get to know someone and they want me to send pictures I don't have a problem with that though.
And, being female you'll still get hits regardless ?
This site is not just a dating site, I think it's less and less that, Some peoples profile pics reflects their personality better than just a posed pic. More information about their likes, attitudes toward things etc., can be gleaned from their comments, likes, poll answers and posts. This gives you an incite before you click on the main profile of that person. Sometimes you won't delve any deeper if the face profile pic isn't what you like.