Its a group you subscribe to. Once you join you will receive messages from the group (sort of like this board) except they will come to your e-mail box instead. You will get work at home opps. If it turns out not to be what you are looking for you just unsubscribe. Wow, can you tell I use yahoogroups a lot?
I just joined the group myself, so not sure. Most are probably direct sales companies. They can be good. I have been involved with direct sales for about 9 years now. There are places to find telecommuting jobs to. e-mail me is you want a place to look. wimbish12@peoplepc.com