Okay so I do have an answer to this, but this is my experience and my experience only. There’s one reader who I LOVE and have gotten close with over the years. Unfortunately her rates on Keen are very high (think $25+ per minute), so most of the time I get a max of 15 minutes.
Several years ago I got out of an almost 6 year relationship and what unfolded afterwards didn’t allow me to get any form of closure. I knew I needed a minimum of an hour to get all my questions answered so I can move on once and for all. She told me she had a private site and if I recall, 1 hour on her site was equivalent to what she charges on Keen. I bought an hour and a half from her site and then on Keen she sent me minutes for the amount of time I purchased. I did get 90% of my questions answered during that period, but did have another call with her a week later with a few follow up questions.