There is an algorithm that SN uses to rank posts. It uses a combination of upvotes but also discounts a user's upvotes depending their "trust" rank which is determined from a "web of trust". Posts then "decay" over time, causing them to lose their rank.

So the aim is for the users to upvote good content, and that's hopefully what fills the main page.

The reason this post likely got a lot of upvotes is because it has to do with earning sats. These kinds of posts are very welcomed, here on SN, it appears.

Does that answer your question?