membership site – selling strategy – offer a preview, test drive or "More info" link in the registration page

Most registration pages I saw force me to start surfing the site to find out what I am actually buying.

I miss the basic info to make a sound choice and that’s not very good

Simply saying “membership” is far too vague

I want to know what is included EXACTLY: How many e-books or audios, forums? support? WHAT????

Is it digital? Instant delivery? Will anything be shipped?

An image is fine but the info must be easily and clearly accessible.

Idealy, a simple link to a detalied “features page”

A simple More info link could work