We use your livehelperchat on deskgig.com. I can tell you with 100% honesty that the day we turned on the pro-active chat our conversion ratio from visitor to user increased dramatically. After we talk with the visitors, 100% (Literally!) of the time they sign up and become a user. They don't all strike up a chat, but the ones who do, always convert. I'm a professional developer and have done this for 15+ years. The pro-active chat is hands down the best tool I have seen and used to get us in touch with our users.
Developing application takes a lot of time. You can support application by donating. There is no company behind this application and it takes away my free time. Every donation matters and does not matter how small it is!