Penny Arcade is reported to have several million readers, and has extended this success to run a series of conventions (one of which just signed a 10 year contract with the convention center authority in Boston), a series of video games, and the founding of the charity Child's Play. Some people might believe that Penny Arcade has a rough understanding of the type of design that engages their intended audience.
If you are intending to make a point, say, about usability, you would likely be more persuasive if you were clear and direct about the argument you are advancing. Perhaps you could reference some research or other facts that supported this line of thinking.
As it stands now, your comments might give the impression that you were startled by colors used on a website and that this has driven you into a snarky, sarcastic rage. Regardless, it is not immediately clear how you intended these comments to be useful to the community.
(I have absolutely nothing against penny arcade, just against the selection of foreground and background color. What it has to do with how successful penny arcade is?)
Mine was not constructive criticism. It was pure criticism. Mine was strong opinion that I hold ( so it do not need any research or facts.) that texts on web should have better readability which can in some part be achieved using better contrast.
IMHO opinions are useful to community.
I used http://readable.tastefulwords.com/ for this article myself.