This is a large FAQ. There is a wealth of information here, but it might not jump out at you right away.
A very useful tool is the "SEARCH" function at the top of the page. The results of a search encompass all of the FAQs on the site, but using a term such as "buddy" or "premium" should provide results that will help you.
After you enter your search term and see the results, scroll down until you see "Site FAQ" and look for your keywords there.