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. 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.

A. Yes, we do.  In the document linked below in the section update member there is details about the API that allows you to suspend a member.  When suspended they will not be able to receive new contacts from the capture pages.
https://webmarketingtool.com/admin/document.php?id=60