Play CTF: How would you exploit HN without being detected?

I'm curious because of a site called upvotes.club that was on the front page last week (https://news.ycombinator.com/item?id=13676362).

YC said HN now gets 350,000 daily users, a lot of companies and people thought it was worth trying to spam/shill here several years ago so it must be worth trying much harder now. If upvotes.club had a reliable enough system to charge money for manipulating us others may have something that works or something in the works too.

The challenge:

1) stay invisible to dang and his team

2) stay unnoticed by all of us in the community

3) take something of value

4) be able to do it again, not necessarily often but on demand

What's your perfect heist?