Uh, I think you missed the part just about about how certain types of criticism belong in certain fora. Ie, this is meta, and a critizism of "bitcoin as ponzi" isn't a comment on the forum software, so it's in the wrong forum.
It is related to the topic of this thread which is censorship. I was testing whether or not censorship is evident. Now we wait for the results.
If I was a mod, I would certainly move your criticism of bitcoin to a part of the forum where criticism of bitcoin is relevant. Whether or not bitcoin is a ponzi is irrelevant to "meta", so the criticism is misplaced. To recap, OP accused mods of censorship, mods replied that most of what they do is move things to the proper places and then folks who don't look carefully think they've been censored. Then you followed up by posting an off-topic, misplaced criticism of bitcoin into a thread in meta. IMO, the test should be whether or not the mods move your criticism into "bitcoin discussion". If they do, then they are following what they said above. This would be organization, not censorship.
EDIT: For info and posterity, here's a nice little thread accusing bitcoin of being a ponzi which is active right now:
https://bitcointalk.org/index.php?topic=901881.0 I think you can find plenty such threads if you look in the right sections of the forum. Cheers!