How to play WoW for free month to month

Most of you already know there is an initial fee that everyone has to pay Blizzard in order to activate a new account so that you can create characters on servers and start playing the game. I forget if the activation fee was $15 or $20, but the point is, there is no way around it and you have to pay $15 a month once you have activated your account. I payed the initial fee to activate my account with my credit card of course, and for a few months after, I payed the monthly $15 with my credit card too, that is of course until my credit card expired. Now I didn't plan on playing WoW for more than a few months, but I also didn't realize that my credit card was going to expire this soon.
So I had played WoW for a few months at my own pace, questing and leveling, twinking a few alts while leveling my main (Ret Pally =P), enjoying the game, spending more and more time playing online, completely oblivious to the fact my credit card was going to expire, and when it did, I would no longer be able to pay for it (because I didn't have any cash on me, it's either all in my bank or gone because of payments to my credit/debit cards/bills). So a I was basically playing the game with no intention of stopping. And all of my decisions in game where made according to my "in the long run" train of thought. I figured it would be a good idea to just twink at 49 on my ret pally and just grind AB and WG marks (since they're easier to get at lower levels) for a week or more, after that I could just level up and turn them in (along with all the other marks) for honor or gear once I hit 80. But unfortunately my credit card expired 5 days after I started grinding marks and I couldn't help but feel that it had expired at the worst possible time.
So my credit card had expired (the one with the lowest interest rate, the one I was using for WoW) and even if I renewed it (or applied for a different one with a reasonable interest rate) it was going to be a while until I could play WoW again. Using any of my other cards was out of the question (interest rates through the freaking roof don't know why I ever got them) and like I said before, I don't carry around too much cash. Out of fear that I may not have enough money to pay for everything at the end of the month, I decided against going over to Wal-Mart and buying a 60 prepaid card ($30 for 60days = $15 a month). So in my free time I began looking around the internet searching for a way to play WoW for free, at least until I got my credit card renewed. I typed crap into search engines and got crap on the search results pages as well. A lot of the search results were private servers, fail youtube vids, or really suspicious websites, none of which I bothered trying out, but I looked at them and could tell they weren't legit. Didn't try the private servers because I was gonna continue playing all of my toons but I just didn't have cash at the moment. What I was looking for was a way to pay for WoW, but the internet had everything except for what I wanted.
Eventually I stumbled upon a FEW (2 or 3 out of like 1,000) websites that didn't look too suspicious because they didn't ask for personal information, didn't require any payment, and didn't even require real info. I figured the worst thing that could happen was get some form of spyware or virus, but it's nothing I would have to worry about with a firewall and an antivirus/antispyware program that I update every time I feel like scanning. 1 of the websites I found didn't look the least bit malicious and because it didn't even require real info or any sort of payment, I decided I would give it a try. Sure enough I have to make some sort of login or username to use the website so I go ahead and get that done, then I go and check out the website's forums (it has forums O.o) and it's not completely barren like I imagined it would be. Forums had a bunch of threads there for noobs, tips and tricks topics, stickies, Q&A posts and whatnot. After figuring out what this website is about and how it works, I go ahead and try to get my "Free WoW".
And so, after like a week of trying (give or take a few days), I had finally "earned" my free WoW. I requested my free WoW knowing that it would probably not come, but it didn't really matter to me because it was only a waste of time, it wasn't like I was being scammed or keylogged. 1 week and a few days after I had requested it, my "Free WoW " came. And so then I type in the code on the official WoW website (knowing very well that it wouldn't work) and to my surprise, the code was legit! I logged into my account that very instant, and I still couldn't believe that it had worked. I had, somehow, stumbled upon something on the internet that was actually FREE. The next month though, my renewed credit card came in, and so I decided I would try to get Free WoW again for this month too (maybe I just got lucky?). Even though it took a little bit longer this time (using the same website), I got my free WoW again, typed the code into the WoW website again, and it worked! AGAIN!
Even though I couldn't find a way to get the expansions for free (BC, WotLK) I still managed to get Free WoW (month to month) up until this day...