Complex sentence: Piczo members would create their own Meebo chatroom for everyone to chat in and they can also add other members' chatrooms, and Piczo members used to be able to create their very own avatar which they were also able to use as their profile picture.
Split into simpler sentences: Piczo members would create their own Meebo chatroom for everyone to chat in. Another deleted feature allowed Piczo members to be able to create their very own avatar which they were also able to use as their profile picture.