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, 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.
If people who want violence win the next set of elections, then that should also be of concern to hackers of websites. Take a look at the actions of the US president, after being called to task for breaking TOS.
With the geopolitical changes that will come about due to the coronavirus and upheaval that is beginning in the United States, it seems that social/web technology is central to geopolitics. It really stuns me that our conscientiousness to society, or lack thereof, isn't discussed far more often.