I would recommend to watch a little of each of the following and try to identify what makes them a success. :
Guinevere_, MJGoneWild, AliceBiscuit, Kickaz, DianneMerek,
Miqote, and
Olivia.
All of these models are good example of what can be accomplished with a Non-nude focus. Even f they are not all non-nudes
Olivia does do nudity in her public chat, though there have been periods of many months where she does not. Kickaz is the master of being nude in her room, but never showing anything that would catch a movie an R rating. Use of camera angle hands, and so forth produces one of the best tease shows on the web. MJ has not gotten nude in a good bit, but she did when she was warring for #1 back last December.
What they all share is level of energy that is astonishing. I'll use Kickaz as my example though it applies to Olivia and the rest too. These women can cam for amazingly long stretches of time and never seem to flag in appearing to burst with energy. Kick and Olivia heavily incorporate custom music playlists into their shows. Kick is a body painter of pretty high skill, and periodically does shows where she paints herself. Olivia is a performance artist, and can amuse and offend at once. But it gets eyeballs and attention. But they can leave a viewer tired out just by the endless energy and general positive feelings they push out. I've seen Kickaz cam while sick as all heck and STILL maintain a level of energy that some rooms never get to.
There are other models like Lorelei who do get nude, but spend more time clothed being teases, doing motion shows, and spending time talking got their rooms and being companions and in some ways virtual dates to the people in the room.
AliceBiscuit is a charming young woman who is a true non nude, who entertains on the strength of her singing ability, and her amazingly sweet personality. Visiting her room is very much like going out to an intimate club with a house singer whom you sit near and enjoy. She might wear very tiny underthings on occasion, but its more of a costume then a blatant sexual thing.
All these women operate on MFC, which allows a lot of latitude to models to find a unique voice in their shows. This is not a surprise as MFC is probably the platform that incorporates the biggest aspects of a social media site. Models can form amazingly close connections to their viewers by talking, doing talent shows and showing that sexuality and sexiness can come in many forms. Aella is another performance artist based room, that while very nude is oft-times gonzo beyond description. VeronicaChaos often has her ventriloquist skills on display and produces some wonderfully demented variety show segments (I still remember the night of too much fire, and a doll that burned WAY too well) MJ runs her card games, acting as a sexy hostess, and being a guys girl. They all have created unique spaces in their rooms that deliver unique experiences for the viewers that are not needfully centered around their nudity, but around the idea that adult entertainment can be much more then just their body.
So to the OP, yes non-nude is very very doable. It's a harder path. It will take longer to find your audience. But if you do, you'll be come to be known for the unique experience you deliver, and for the people who like it, you'll be the only place they can get it. And success can follow.
Spend an hour watching Alice or Kickaz. They are on most eves, catch Veronica or Olivia and see how they command their rooms. That will be the easiest and best way to see what is possible.
Good luck!