Gain 5 or 3 hacking skill points after each successful hack depending on difficulty of hack attempted or 1 point for failed hack. All point gain is configable using ini. 

Rewards can be randomized using ini setting. I also left debug settings in the ini which makes hacks always succeed and makes them not cost an action (similar to lightning hands). These are off by default. 

If you're concerned with OP then turn on the diminishing returns options in the ini. Reward gain is reduced by 1 for every 20 levels above a certain value. (Based on Zetsumi's suggestion)

Inspiration came from watching ChristopherOdd's Legend Ironman playthrough on YouTube. Techno-bable follows: This mod uses UIScreenListener to modify FinalizeHack and FinalizeIntrusion, FinalizeSkullJack and FinalizeSkullMine templates. Anything that modifies hacking in these templates will likely conflict. 

My other mod:
Suppressive Reaction Fire - http://steamcommunity.com/sharedfiles/filedetails/?id=657882428

v1.3
Fix Skulljack and Skullmine not working
Changed preview picture

v1.2
Added diminishing returns to address OP concerns
Removed some debugging code

v1.1 
Added tiers for success reward 
Added a on fail reward 
Added randomize reward flag 
Added fly over text on unit to indicate point gain 
Changed preview picture 

v1.0 
Initial version 
+5 gain for every successful hack

tags= gameplay, soldier customization