How do I get more Karma?
... and can I buy coffee with it? (what is it for?)
https://news.ycombinator.com/newsfaq.html https://news.ycombinator.com/newsguidelines.html
1) post and patiently wait for your points to rise. You may skew or bend your opinions to maximize gains or post honestly from the heart/mind
2) gather a group of freinds and upvote eachothers posts. I find there are many lurkers here that seem to attempt to control narrative by doenvoting without posting responses.
3) create a few bot accounts abd write a script that upvotes withthese accounts on every post. This is probably the most reliable way and I would guess how crap/duplicate articles consistently reach the front page.
It's not very unusual, but the site has many spam, shills, bots and voting ring detectors. If the system or a mod detect this behavior the votes will not be counted and in some cases the accounts will be banned.
It's better to stick to the old method of posting interesting stories and comments, and hope that the other users will find them interesting too.