Several years ago, I worked on two phone lines, and neither of them pushed me to extend readings. In fact, the clients paid ahead for a certain amount of time, and the connection was terminated when the time limit was reached. One of the outfits I read for was Psychic People, and they treated me, and the clients, well. I only stuck with it for a couple of months, though, because I found I didn't like being tied to the phone, whether it rang or not, for several hours each week. Both of the companies I read for required a minimum time commitment each week during which you would be available.
It was far more harrowing than sitting across from a client, because I wanted to get each person the most information for their limited amount of time. If you are interested in developing speed, I would recommend it. For monetary gain, I think you'd be better off finding a place to read for people in person.
If you are going to do this, I would recommend a smallish site where you are required to give a reading to the boss before you are allowed to read. That at least shows they are somewhat concerned with quality. Also, be prepared to spend months before building up a regular clientele. There are a ton of readers on every site, and the ones that are successful have been there for years.
If you feel you need more experience reading for strangers, I would recommend doing one card readings on the Free Tarot Network. You don't get paid, but the experience is well worth it.
