This is how it SHOULD work, but I know it' s messed up (a moment ago your contribution was -4, it makes no sense at all).

There are no official blogs explaining the how it works

That's because there is no need to know that. This site is for programming and not for gaining useless contribution points

Can someone explain how the scoring works exactly?

// code to calculate cf rating

#include<bits/stdc++.h>
using namespace std;
int main()
{
long long your_contribution = 0;
   while(you_are_grey)
   {
        your_contribution -= LLONG_MAX;
   }
   while(you_are_green) 
   {
      your_contribution -= 10;
   }
   while(you_are_blue)
    {
    your_contribution++;
    }
    while(you_are_purple)
     {
    your_contribution += 10;
    }
    while(you_are_orange)
    {
    your_contrribution += 40;
    }
    while(you_are_red)
    {
    your_contribution += 100;
    }
    while(you_are_nutella)
    {
    your_contribution += LLONG_MAX;
    }
    cout << your_contribution<<endl;
}

I just know votes from high-rated users are weighted higher, which might be the reason.

Still, you should NOT care how this function of the site works. Instead, click on "Contests", then click on "Virtual participation", then on "Register for virtual participation".

can someone gimme some upvotes, my rating is so low that I think high contribution is my only way to be able to flex with my friends.

Commenting to make a new friend in this community.

i want to get +1 contribution pls :)

pls can anyone see my comment help me to increase my contribution

Something that I have noticed is that when it says your amount of upvotes/downvotes is 0, that means that it might range from something like -3 to 0. I have noticed that, because when my friend upvoted on one of my comments, it didn't update, and just said it was 0 upvotes/downvotes as well. Plus, have you even seen any -1 or -2 on comments? I've never seen that. Please correct me if I'm wrong.