📝 Add perverse incentive example

Author: davidgasquez

Incentives.md

@@ -20,6 +20,7 @@ Behavior is hard to fix. When people say they've learned their lesson, they unde
   - Intentional system design.
   - Commitment to study the metric.
 - Human values are highly dimensional. Nudging people in the right direction is hard, especially because nudges usually are very low dimensional.
+- [Incentives might be perverse and the effects will be unexpected and contrary to the intentions of its designers](https://en.wikipedia.org/wiki/Perverse_incentive) (e.g. Hacktoberfest spamming Pull Requests on Open Source repositories causing more work for mantainers).
 
 ## Incentive Framework