Why was this topic locked?

As I've explained when closing the topic, the answer to the rule question has been answered. Derivative discussions (if any) must take place elsewhere, for example the Card Balance & Strategy Discussion. If another rule question raises, it must have its own topic.

Doing otherwise leads to lose valuable informations in a mass of vaguely related topics. (I'm opened to discussion about this).

Now, the reason why I've locked the topic rather than letting it die is that moderators have received a complain concerning the lack of etiquette of the original post of the topic (meaningless title and message). The message have a poor quality regarding the original question -- or wasn't born under the right star if you prefer -- (even though I changed the title to make it more valuable through a research) and I didn't want it to contain interesting questions that deserve their own topic.
This doesn't mean of course that there's any kind of censorship, you are free to create topics as mentionned above.