Points
What they are, how you earn them, and what they buy.
Points are a way to keep track of what you have read and to open up the downloadable material without paying for it. They are not a currency, they cannot be bought, and they do not expire.
You need an account to collect them, because they have to be attached to someone. Everything on the site is readable without one.
How You Earn Them
Each article can pay out once for each action, so the total from any one article is 14 points. The awards are worked out on the server when the action happens.
The Question of the Day
One question, once a day. It changes at midnight, your local time, and you get one attempt at it. The tab is on every page, so you never have to go looking for it.
A wrong answer costs nothing. You are shown the correct one and why it is correct either way, which is the part worth staying for.
What They Buy
Your balance and everything you have spent are on your account.
Start by reading something, or go straight to the resources to see what the points are for.