What to Submit On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.

Off-Topic: Most stories about politics, or crime, or sports, or celebrities, unless they're evidence of some interesting new phenomenon. Videos of pratfalls or disasters, or cute animal pictures. If they'd cover it on TV news, it's probably off-topic.

I'm wondering how does this domain name being on sale fit into the on-topic section? Perhaps you can elaborate how this gratifies my intellectual curiosity that things get sold.

Additionally coasting a question about why something got flagged also doesn't fit the general intellectual curiosity. Posting it twice doubly so.