From the mouth of the wolf himself:
All you have to do is get MPEx mentioned in the press. You will not be paid for anything other than this : getting mentions. Personal blogs do not count, random sites nobody heard about don't count. As a general rule with few exceptions, unless it used to be a widely circulated newspaper before 1990ish it's a waste of your time. Actual print mentions are ok even though the links aren't clickable : I will send copies of the issue to my mother to bother her.
You are free to negotiate your rate, and if you can show ample and convincing proof of previous success in comparable endeavours you may even obtain a retainer. Contact me via email. You can be starting as soon as right now.
Whole story.