With the Instantgo chats, you can easily charge for the conversations you receive and reply. In order to get paid for chatting, you simply need to click on the $ sign when in a chat conversation with another user. Based on the services you offer, you can request a payment to be made to you for a specific amount and then provide your service over the chat.
In order to close a conversation, simply click on the "$" sign appearing on the top right of the chat screen. By clicking on it, you will be able to close that conversation, rate the other user and disable several ways for them to contact or schedule time with you (until next payment for example).