OrgPad in Top #3 on ProductHunt

We are working on OrgPad for last three years and we have finally introduced pricing a few months ago. We are slowly growing the number of paying customers while improving the product as much as possible.

OrgPad is an iteractive whiteboard for your ideas. You can place your ideas right in front of you and connect them together. Arbitrary texts, links, pictures, videos, or even another websites can be easily combined together. At first it might seem similar to any other mind-mapping application but it offers much more. In particular you are completely free to organize your ideas and problems in any way you want.

We tried to list it on ProductHunt: https://www.producthunt.com/posts/orgpad. At the beginning, we just had a small number of upvotes from our community so it did not seem that useful. But today we suddenly ended up as Top #3 which landed us several comments and a first sale. An amazing Christmas present to us.

Do you know why this happened? How are top products on ProductHunt chosen?