Zynga is a company that makes online games. And people often criticize Zynga for making games (online games, Flash games, Facebook games, casual games, etc.)
Even big startups are hard. Zynga is startupy, even though they're public.
There's a lot of schadenfreude on HN when it comes to Zynga. Articles about Zynga's problems regularly make it to the top of HN.
Some people think games are frivolous. They're not. Entertainment is (almost) a basic human need. Some people think Zynga players are somehow being tricked. They're not. They're being entertained.
Some people say that Zynga steals ideas. Firstly, I'm guessing 99% of the people who say that are just repeating something they've heard. The other 1% should know that everyone steals from everyone. Unless you're the first guy to ever make a dynamic website, have usernames, top-bar navigation... you stole a lot of ideas too. And the ideas you stole are more fundamental than the plot of a game.
(also, if you know my history (i used to make fun of companies like this for a living) yes, i understand the irony of me writing such a supportive comment.)