I became an official madridista here 5.5 years ago, got some discounts, the Tour and the card was told me to be sent to me in a month. nothing came and the payment didnt went through either. Then I endet up printing out the formular linked and send it to them all traditionally per post. That worked.
If you plan to go to Madrid, I can just advice it to get it here (at the stadium, Torre A). Ivan has got his there. Its 40€ for all and you get a scarf as present, the newest journal edition and free entrance to the Tour (that is 16€). I say get it at the stadium, because if you buy in Calle Carmen, like a guy I met and as I had last time, you dont get the card directly and so you cant enter Valdebebas.
There are Ticket offices in Valdebebas and entry is just something about 3€ but I have never seen it open and I was there quite a few times. When you dont have a card and the cash desk is closed they wont let you in like it happened with Ivan, who couldnt see RMC this way. With the card you can just walk in. Plus you can see Castilla for free as well, even though youll get a ticket.
For a game its very useful to have an advantage of 1 day before the public sale of the tickets. Per phone & web. Web is very convenient, although you should be aware that you should take the same credit card with you which you buy the tickets. Right next to the adidas shop are machines where you just enter the card press print and your tickets will be printed. (Goes the same way at servicaixa I think, Ivan has used, he can tell you later about his experiences).
You get percentages at the shop (5%), the tour (11€), Real Cafe and RM basketball games.
as well as getting the journal sent to your home (paper edition) or per email, depending on the package you choose.
P.S. when you buy it here be sure your credit card is accepted. MasterCard, Visa,...