Yes @omitaylor. They reward contributors under following categories:

They have separate rules for each of the category. I wouldn't call them rigid but they are there to ensure the quality of the contributors. My last three contributions were rejected on various basis but that's okay. This time I think I have nailed it.

If you follow all the rules and make a unique suggestion or any other kind of contribution to open source projects via @utopia-io, you will def get rewarded. I learnt from the people who made successful Utopian posts and just followed what they did. :-)