In $20 Deal you enter chat with expert having 20 minutes. You get first three minutes free with every new chat session.
For chat sessions to be @$1.25 you will have to buy Popular time pack. You get total 40 minutes chat time. This excludes free time wihich you always get. This time pack can be used multiple times untill your last minute is consumed.
Free intro experts are who are ready to talk with you for maximum of 5 minutes. Experts are not allowed to do any kind of reading in free time. However you can ask if expert can help you in particular area or with specific question.
You must have at least $20 balance in your account to have Free intro. Second free intro with same expert can be held afer 24 hours. Maximum two Free intros are allowed in 24 hours.