I'm sorry the information on that page was a bit outdated. I have had problems getting the automated Paypal payment options to work.
In fact so much that I have decided to skip it for now.
So please check out the new payment options: http://dynamicsuser.net/forums/p/234/1069.aspx#1069
Please notice that you still don't have to be a sponsor to post your jobs, only if you want to have it to stay in the top listing.