Just help people out by answering questions! It's based on how many votes, or "bravos" your comments get from others! Quite a simple system. Here's some more details: https://productioncommunity.publicmobile.ca/t5/Rewards/Community-Reward/td-p/415
I'm not familiar with any regular codes given out by the PM. I think they're mostly on special occasions or a case-by-case basis for service issues. However, PM is quite cheap as is! Best of luck finding a code if you continue to hunt for one! Rememb...
