Many times. Just the other day I had a question about Skylight (which we use where I work) and I was promptly helped through the widget. Granted, this could als

Many times. Just the other day I had a question about Skylight (which we use where I work) and I was promptly helped through the widget. Granted, this could also have been done through e-mail, but it is pretty convenient to have it on-page. 99% of the implementations you encounter though are failed sales attempts. Fake human prompts like "Hi, can I help you with something?". When they are accompanied by a sound they are even more annoying. I have heard from marketing people that they convert pretty well though.