Question   If I provide the API key to a third party affiliate program, will a new member signup in that program automatically create an account in my site for that member?

A. An application programming interface, or API, allows other websites to communicate with our website sending commands to add/edit/delete items and getting reports.

These are used by developers to integrate 3rd party software with our software.  For example, our API allows you to have members automatically created in your system when someone signs up at a separate site you own.

A. In your members area, go to the "Advanced Features" page, then click on the "Misc" tab, then put the url for your webinar page in the "Redirect Page" field.
Put the full url, including http://. 
Also, put ?user=~username~ at the end of the url so that it will go to the appropriate member's page.

Exa:
http://yourdomain.com/webinar.php?user=~username~

A. Yes, it's editable by editing the .html file in the File Manager. 

The file you would edit is:
/uploads/adminpages/do-join.html

A. With a normal system using default settings, yes. If using direct payment to members, then no.

A. No, it is not possible with Direct Pay to have someone first make payment before creating their account.  They MUST create their account before payment for things to track correctly.