How do dialers like gxbill work
 

They have Senegal (or other exotic far away place) area code, lets say a user makes a 2 minute call for 5dlls
how is it divided up by the phone company, gxbill an me, they dont have any terms or rates in their page.

First off, if you're going to run a business, you need to be able to find answers to your problems. Obviously you ignored their FAQ section because if you had read it you would have found the contact form they provide to ask the question.

You're interested in their GX900 - Per Call One Time Phone Billing, right?

Well then head back to their website /phone_billing, read that section and then submit your question to them through /contact. They will be more than happy to answer your questions.

Dudes I have emailed them they dont answer, I was asking for a generic answer do dialers not just gxbill, you be surpised that they dont have rates visible anywhere.

They might not directly tell you their prices, but they do mention there is no signup fees and that they charge per transaction, which translates to per call or block of time. I am purely guessing, but it's probably somewhere around 20-30% of the fee charged to the client. I guess that based on the fact that GXbill handles all processing.

Now how does the tech work? Well that's easy really. There is some system that receives a call. The automation collects name, address, card info and issues out the access code upon successfully processing the transaction. You could build a system like that yourself. Just hire a programmer to integrate with SMS or Voip and attach a voice auto pilot to it with predefined options. After the data is collected, your programmer will have made it so the data is passed for processing. If the callback is successful the caller is issued a code, otherwise the caller is alerted that their card was declined and asked for another card or to try again later. It's just a code loop until call ends or success is called back. Furthermore you'd have to become a merchant and tie that into this auto pilot system, but for a programmer that would be cake.

Who pays by phone today anyway?