Hello,
because you have Downvote someone or Receive a downvote.
Here you can find the info about the points system: https://docs.mendix.com/developerportal/mendix-profile/
Downvote someone -1
Receive a downvote -2
Regards,
Ronald
On the Mendix forums you have to ask the right kind of questions and provide the right kind of answers. Don’t pay too much attention to the point system, just learn as much as possible