You don’t get contribution unless you contribute, of course

You can also get positive contributions by writing funny comments, but that only works if you're red..

Want to get positive contribution? Test a contest and comment As a tester, ... anything comments on the contest announcement blog :)

You can get little contribution if you just write some good comments (like short info about something, wishes to someone, something funny etc)

But to get very much contribution (like 150+) you should make something really useful and do this several times (like make many contests blogs, some blogs with very helpful information etc)

Usually, if you write something useless/insulting you are getting downvotes (especially after second one)

So, to get contribution just communicate kindly and help someone :)

P. S. Also, as i know, when like a year passes after you publish your comment/blog it will give much less contribution to your account (maybe even 0)

Just don't give a reason for people to downvote you ^_^